Let Lili have X yuan, and every family has Y yuan.
3/5 times = 2/3 years
2/5x= 1/3y+5 (Lily has 2/5 left, and 1/3)
X=50 y=45 when solving a quadratic equation, that is, Lily 50 yuan's 45 yuan book 30 yuan.
2. A car consumes 4/5 kilograms of fuel per line for 8 kilometers, and how many kilometers per kilogram of gasoline is feasible on average. How many kilograms does driving 1 km consume?
8 divided by 4/5= 10 (km/)
4/5 divided by 8=0. 1 (kg)
3. A motorcycle 1/2 hours for 30 kilometers. How many kilometers does it travel per hour? How many hours does it take him to drive 1 km?
30 ÷1/2 = 60km1÷ 60 =1/60h.
Four out of seven students reading in the reading room are boys. After five male students walked out of the reading room, twelve of the twenty-three were female students. How many students were reading in the original reading room?
There are x students, and the number of girls remains the same, so (1-4/7) x = (x-5) *12/23.
Find x=28
There are 62 red, yellow and blue balloons, of which three-fifths of the red balloons are equal to two-thirds of the yellow balloons, and there are 24 blue balloons. How many are Red Balloon and Yellow Balloon?
62-24=38 (only)
3/5 red =2/3 yellow
9 Red = 10 Yellow Red: Yellow = 10:9
38/( 10+9)=2
Red: 2* 10=20
Yellow: 20*9= 18
There are 36 students reading in the school reading room, 4/9 of whom are female students. Later, several female students came. At this time, the number of female students accounted for 3/5 of the number of students. Later, several female students came.
Original female student: 36×4/9= 16 (person)
Former male classmate: 36- 16=20 (person)
Total number of employees: 20( 1-3/5)= 50 (persons)
Female: 50×3/5=30 (person)
Number of female students: 30- 16= 14 (person)
7. When water turns into ice, its volume is110, 2. 16 cubic meters of ice melts into water, what is its volume?
2.16/(1+11) =1.98 (m3)
8. Party A's grain is 560 tons. If 2/9 of Party A's grain is shipped to Party B, Party A's grain is exactly the same. How many tons of grain does Party A have? How many tons of grain does B have?
Now both parties have their own.
560 ÷ 2 = 280 tons
It turns out that Jia has
280 ÷ (1-2/9) = 360 tons.
It turns out that b has it.
560-360 = 200 tons
9. The price reduction of TV sets in 200 yuan is 2/ 1 1. What's the price of this TV set now?
The original price is
200 ÷ 2/ 1 1 = 2200 yuan
The current price is
2200-200 = 2000 yuan
10。 Car A has traveled more than 2/5 kilometers from A to B.. At this time, there are still 70 kilometers from B. How many kilometers are there between A and B?
Full time
1-2/5=3/5
be
20+70 = 90km
Distance between Party A and Party B
90 ÷ 3/5 =150km
1 1. Xiaoming reads books. On the first day, he read 28 pages. The next day, he read the whole book 1/5 (1). Last two days, * * * read 3/8 (8/3) of the whole book. How many pages does this book have?
What I read on the first day accounted for the whole book.
3/8- 1/5=7/40
This book * * * has
28/7/40 = 160 page
12. Both the master and the apprentice are processing a batch of parts. After a period of processing, the master processed 84 parts. The apprentice made 63 parts. The master works more than the apprentice, accounting for 1/28 of all tasks. How many parts are there in this batch?
Suppose this batch has x parts.
1/28X=84-63
1/28X= 19
X=532
So there are 532 parts in this batch.
13. A barrel of oil, after eating 7/ 10, added 15 kg. At this time, the oil in the barrel is exactly half of that in a barrel. How much does this barrel of oil weigh?
15 ÷ (7/10-1/2) = 75 (kg)
14. A train runs from Shanghai to Tianjin, accounting for 3/5 of the whole journey. If you drive at 106 km/h, you can reach Tianjin in five hours. How many kilometers is the railway from Shanghai to Tianjin?
( 106*5)/( 1-(3/5))
=530/0.4
=1325km
15. There are 46 students in grade six who participate in math interest groups, among which 4/5 girls are 3/2 times as many as boys. How many boys and girls joined the interest group?
The ratio of male to female students is 4/5: 3/2 = 8: 15.
Number of boys: 46/(8+ 15)*8= 16.
The number of girls is 46- 16=30.
16. It takes Zhang Hong five hours to copy a manuscript. This manuscript has been copied by others 1/3, and the rest was given to Zhang Hong. How many hours does it take to copy it?
( 1- 1/3)/( 1/5)= 10/3
It takes 3 1/3 hours to complete the replication.
17. Two trains leave from two cities 600 kilometers apart at the same time. One train runs at 60 kilometers per hour, and the other train runs at 75 kilometers per hour. How many hours will the two trains meet?
600/(60+75)=40/9 (hours)
After 40/9 hours, the two cars can meet.
18. A motorcycle travels 64 kilometers per hour. It takes 3/4 hours to find this speed from a to b. What is the distance between a and b?
64× 3/4 = 48km
19. The fruit shop sold a batch of fruits in two days. On the first day, 3/5 of the total fruit weight was sold, 30 kilograms more than the next day. How many kilograms are there in this batch of fruit?
If you sell 3/5 of the total weight of fruit on the first day, you will sell 2/5 the next day.
3/5-2/5= 1/5, the first day is more than the second day,
30 ÷ 1/5 = 150kg，
The formula is,
1-3/5=2/5
3/5-2/5= 1/5
30/1/5 =150kg
20. Jessie Primary School has 9 10 students, seven quarters of whom are girls. How many are girls? How many boys are there?
9 10 * 4/7 = (9 10 * 4)/7 = 520 ...
9 10-520=390 ... boys
2 1. A rectangular piece of land is 60 meters long and 2/5 wide. What is the area of this land?
4/5*5/8=(4*5)/(5*8)= 1/2 (m)
4/5- 1/2 = 8/ 10-5/ 10 = 3/ 10(m)
22. The ratio of red goldfish to black goldfish in the goldfish pond is 7:3. There are 9 black goldfish. How many red goldfish are there?
9 ÷ 3× 7 = 2 1
Grade 23.6 students 132, in which the ratio of male to female students is 6: 5. How many boys and girls are there in the sixth grade?
132 ÷ (6+5) = 12 people
Male students have
12× 6 = 72 people
Female students have
12× 5 = 60 people
24. The ratio of A to B is 2:3, and the ratio of B to C is 4:5. Find the ratio of a to C.
A: B = 2: 3 = 8: 12。
B: C = 4: 5 = 12: 15。
A: B: C = 8: 12: 15.
A: C = 8: 15
25. The number of trees planted in Jiefang Road Primary School this year is 65438+ 0.2 times that of last year. Write down the ratio between the number of trees planted in this primary school this year and the number of trees planted last year.
1.2: 1=6:5
Last year, the ratio of the output of color TV sets to the total output of TV sets in a TV factory was 9/20. Last year, * * * produced 250,000 TV sets, including how many color TV sets?
250000× 9/20 =112500 sets.
27. Workers in a factory account for two-thirds of the total number of employees in the factory, technicians account for two-ninth of the total number of employees in the factory, and the rest are cadres. Write down the proportion of workers, technicians and cadres in this factory.
Cadres account for 10% of the total factory employees.
1-2/3-2/9 = 65438/9+0
The ratio of workers, technicians and cadres in this factory is
2/3: 2/9: 1 = 6: 2: 1.
The number of students in a class is between 40 and 50, and the ratio of male to female is 5:6.
How many boys and girls are there in this class? ..
Because the number of people is an integer,
So the class size can be divisible by 5+6 = 1 1.
So the class size is 44.
Boys have
44 ÷ (5+6) × 5 = 20 people
Girls have
44-20 = 24 people
29. The ratio of science and technology books to literature and art books in the library is 4: 5. After purchasing 300 works of art, the ratio of science and technology books to literature and art books is 5: 7. What percentage of literature and art books have increased?
Original literary works: 300 ÷ (7/12-5/9) =10800 (this).
The number of literary and artistic books increased: 30010800 ≈ 2.8%.
30.100g sugar water just fills a glass, including10g sugar. Pour out10g sugar water from the cup, and then fill the cup with water. What's the ratio of sugar to water in the quilt?
It turns out that the water in it is 90 and the sugar is 10.
Pour out 10g, with 90 left, including 8 1 water and 9 sugar.
Fill it with water, the water is 9 1, and the sugar is still 9.
That is 9/9 1.
3 1. There are only 175 students in grades 5 and 6. Divide into three groups to participate in the activities. The ratio of the first group to the second group is 5: 4, and the third group has 67 people. How many people are there in the first and second groups?
(1) The first and second groups have 175 students * * -67 students = 108.
(2) A group has 108 students ×5/9=60 students.
(3) There are 108 people in the second group ×4/9=48 people.
32. There are 465 students in a school, of whom 2/3 are girls and 20 are less than 4/5 boys. How much is the male and female?
Two thirds of the girls are 20 less than four fifths of the boys.
Girls are less than boys by 20/(2/3)= 30(4/5)/(2/3)= 6/5.
Boys have
(465+30)/( 1+6/5)=225 (person)
Girls have
465-225=240 (person)
33. For a manuscript, 1 7 was typed on the first day, and 2/5 was typed on the second day. The next day was nine pages more than the first day. How many pages are there in this manuscript?
9 divided by (2/5-65438/7+0)
=9 divided by 9 of 35.
=35 pages
This manuscript has 35 pages.
34. On a piece of land, the aspect ratio is 8: 5, and the length is 24 meters more than the width. How many square meters is this land?
If the length is 8 and the width is 5, it is more than 3, which is 24 meters.
Then one is: 24/3=8 meters.
That is, the length is 8 * 8 = 64m and the width is 8 * 5 = 40m.
Area: 64 * 40 = 2560m2.
35. If there are 25% more boys than girls, how many girls are less than boys?
Female students 1.
For boys, 1+25% = 125%.
The number of girls is less than that of boys (125%-1) ÷125% = 20%.
36. This breeding factory has raised 65,438+0,987 pigs this year, which is three times less than that of last year, that is, 245 pigs. How many more pigs have been raised this year than last year?
Raising pigs last year: (1987+245)/3=744.
Raise more pigs this year than last year: 1987-744= 1243.
37. The ratio of Xiao Wei and Xiaoying's donation to Project Hope is 2:5. Xiaoying donated 35 yuan. How much did Xiao Wei donate?
Let Xiao Wei donate X yuan.
So 2:5=X:35: X= 14 yuan Xiaowei donated 14 yuan.
38. All three averages are 8.4, of which the first number is 9.2, and the second number is 0.8 less than the third number. What is the third number?
The third number is 8.4.
Solution: Let the third number be x and the column equation be:
3*[9.2+(x-0.8)+x]=8.4
The solution is x=8.4.
39. There are two ropes. The length of the first rope is 1.5 times that of the second rope, and the second rope is 3 meters shorter than the first rope. How long are these two ropes?
If the length of the second root is x meters, the length of the second root is 1.5x meters.
1.5x-x=3
0.5x=3
x=6
6× 1.5 = 9 (m)
The first one is 6 meters long.
The second one is 9 meters long.
40. The construction team built a road, and the repaired length and the remaining ratio were 4: 5. If you build another 25 meters, it will just reach the midpoint of this road. What is the total length of this road?
4+5=9
Solution: Let this road be x meters long:
(5/9-4/9)x=25
1/9x=25
x=225
This road is 225 meters long.
4 1. A factory plans to use 54 tons of coal in June. In the first half of the month, the average daily coal burning was 1.6 tons. If the remaining coal burns 1.5 tons per day, how many days can it burn?
42. In the "three jumps" activity, the number of people skipping rope is three times that of kicking shuttlecock. It is understood that there are more people skipping rope than kicking keys 18. How many students are there in skipping rope and kicking shuttlecock respectively?
43. The shop has a batch of sportswear. I sold 35 pieces on the first day and 28 pieces on the second day. The next day's income is less than that of the first day 168 yuan. How much did each sportswear cost?
44. The sewing group has 27.8 meters of cloth. It is planned to make 8 sets of adult clothes first, and the rest of the cloth will be made into children's clothes. According to1.4m fabric, how many sets of children's clothes can be made?
Xiao Ming read a 450-page book. For the first three days, he read 30 pages a day, and the rest read 40 pages a day. How many days does it take to finish reading this book?
46. A car from A to B travels 120km in the first two hours and 2 10km in the last three hours. How many kilometers per hour do you drive on average?
47. A road construction team 13 people will repair 9.75 kilometers of roads in three days. How many kilometers will 15 people build roads in five days if everyone's work efficiency remains the same?
48. The students donated clothes to the disaster area, 890 pieces for the first time and 950 pieces for the second time. How many pieces were donated twice?
49. The school held a skipping contest. The fourth-grade group jumped 800 times and the fifth-grade group jumped 950 times. How many times did the fifth-grade group jump more than the fourth-grade group?
50. The school held a skipping contest. The fourth grade group jumped 800 times, and the fifth grade group jumped more than the fourth grade group 150. How many times did the fifth grade group jump?
5 1. This plane flies 360 kilometers per hour. How many kilometers do you fly in 7 hours?
52. The kindergarten bought 36 Jin of apples, 12 Jin of pears. How many times does the apple weigh?
53
Kindergarten bought 12kg pears, and the weight of apples is three times that of pears. How many kilograms of apples are there?
54. The kindergarten bought 36 kilograms of apples, which are three times as heavy as pears. How many kilograms of pears are there?
55. Party A, Party B and Party C plant trees in plots A and B respectively, with 900 trees in plot A and 250 trees in plot B 1 250. It is known that Party A, Party B and Party C can plant 24, 30 and 32 trees every day, of which Party A plants trees in plot B, and Party B plants trees in plot A first, and then moves to plot B. ..
56. There are three grasslands with an area of 5 15 and 24 mu respectively. The grass on the grassland is as thick and grows as fast. The first grassland can feed 10 cows for 30 days, and the second grassland can feed 28 cows for 45 days. How many cows can eat on the third grass for 80 days?
57. A project, contracted by both parties, can be completed in 2.4 days and needs to be paid 1800 yuan; Contracted by Team B and Team C, it can be completed in 3+3/4 days, and it needs to be paid 1500 yuan; Contracted by two teams, Party A, Party B and Party C, it can be completed in 2+6/7 days at a cost of 1.600 yuan. On the premise of ensuring the completion within one week, which team will spend the least?
58. There is a rectangular iron block in the cylindrical container. Now turn on the tap and pour the water into the container. In 3 minutes, the water surface is just above the top of the cuboid. /kloc-After 0/8 minutes, the container has been filled with water. It is known that the height of a container is 50 cm and the height of a cuboid is 20 cm. Find the ratio of the bottom area of a cuboid to the bottom area of a container.
59. Two bosses, A and B, bought a dress at the same price, and B bought 1/5 sets more than A, and then they sold it at 80% and 50% profits respectively. After both of them were sold out, A still made more profits than B, just enough for him to buy 10 this fashion, which A originally bought.
60. There are two water pipes, A and B, and water is injected into two pools with the same size at the same time. At the same time, the water injection ratio of A and B is 7: 5. After 2+ 1/3 hours, the sum of the water injected into A and B is just a pool. At this time, the water injection rate of pipe A is increased by 25%, while pipe B remains unchanged.
6 1. Xiaoming walks from home to school in the morning. When he ran halfway, his father found that Xiao Ming's math book was left at home, and then he rode to deliver it to Xiao Ming. When catching up, Xiaoming still had 3/ 10 to go, so he got on his father's car and was sent to school by his father. So Xiao Ming got to school five minutes earlier than walking alone. How long does it take Xiaoming to walk from home to school?
62. Both A and B started from A and went to C via B. The distance between A and B is equal to the distance between B and C. The speed of B is 80% of that of A. It is known that B started earlier than A 1 1 minute, but stayed in B for 7 minutes, but A drove all the way to C. Finally, B was better than A.
63. Two cleaning vehicles, A and B, perform the task of cleaning the road between east and west. It takes 10 hour for car A to be cleaned alone, and 15 hour for car B to be cleaned alone. Two cars leave from east and west at the same time. When they met, car A was cleaner than car B12km. How many kilometers is it between East and West?
64. At present, four containers weigh 3 tons, five containers weigh 2.5 tons, 14 containers 1 0.5 tons, and seven containers weigh1ton. How many cars with a load of 4.5 tons are needed to transport all containers at once?
Comprehensive Training of Mathematical Application Problems in Primary Schools (02)
65. Both the master and the apprentice * * * process 170 parts, and the number of parts processed by the master is more than that of the apprentice 1/4 1/3, so how many parts has the apprentice I * * * processed?
66. A cart and a car are both driving from A to B, and the speed of the cart is 0% of that of the car. It is known that the big car started 17 minutes earlier than the small car, but it stopped at the midpoint of the two places for 5 minutes before continuing to B. However, after the small car started, it went straight to the second place without stopping. Finally, the bus came second before the bus. It is also known that the bus departs from the first place at 10 in the morning. So when did the bus catch up with the bus in the morning?
67. For a manuscript, it takes 14 hours for Party A to type alone, and 20 hours for Party B to type alone. If Party A enters 1 hour first, then Party B replaces Party A 1 hour, and then Party A replaces Party B 1 hour. ......................................................................
68.2 yuan 3 yellow balloons, 2 flower balloons in 3 yuan, 32 balloons bought by the school, 4 of which are less than yellow balloons. What balloons do schools spend more money on?
69. The sailing speed is 60 meters per minute. In a river with a current speed of 20 meters per minute, the ship travels from the upstream port to the downstream place, and then returns to its original place. * * * It takes 3 hours and 30 minutes. How many meters did the ship travel from the upstream port to the downstream?
70. Granary A contains 43 tons of flour and Granary B contains 37 tons of flour. If the flour from granary B is put into granary A, after granary A is full, the remaining flour from granary B accounts for1/2 of the capacity of granary B; If the flour from granary A is put into granary B, after granary B is full, the remaining flour from granary A accounts for 1/3 of granary A's capacity. How many tons of flour can each granary hold?
7 1. When the number A is divided by the number B and the number B is divided by the number C, the quotient is equal and the remainder is 2. The sum of the numbers A and B is 478. So what is the sum of a, b and c?
72. A car traveling from A to B will arrive 1 hour later than the original time if it slows down 10%. If the speed is increased by 20% on the basis of the original speed 1 80km, it will arrive1hour earlier than the original time. What's the distance between a and b?
73. A school participated in a military training performance competition and organized a phalanx team. If there are 60 students in each class, there must be at least 4 classes in this phalanx, and if there are 70 students in each class, there must be at least 3 classes in this phalanx. How many people should this phalanx consist of?
74.a, B and C lathes process square and round parts. It is known that two out of every three parts machined by lathe are round; Three out of every four parts machined by lathe B are round; Four fifths of the parts processed by lathe C are round. On this day, three lathes * * * processed 58 round parts, and the number ratio of square parts processed was 4: 3: 3. So how many parts were processed by the three lathes on this day?
75. The length of the circular metal wire is 30m, with three metal wires with the interception length of A and five metal wires with the interception length of B.. If two metal wires with interception length b are intercepted, the remaining metal wires are 0.4m shorter, and if two metal wires with interception length a are intercepted, they are 2m shorter. How many meters is the length a equal to?
76. A company wants to transport two kinds of building materials, A and B, to the construction site. Building materials A weigh 700kg each, with 120 * * *, while building materials B weigh 900kg each, with 80 * * *. It is known that a car can transport up to 4 tons at a time, so how many times do five identical cars have to be transported at the same time?
77. The distance from Wang Lijia to the school is longer than the distance to the gymnasium 1/4. One day, Wang Li watched the game in the gym and walked home in 17 minutes. After a short rest, it took him 25 minutes to walk to school, which was slower than coming back from the gym 15 meters. How far is it from Wang Lijia to school?
78. Mentoring works together to complete a project. Because of their good cooperation, the master's work efficiency has been improved110, and the apprentice's work efficiency has been improved 1/5. After six days of cooperation, two-fifths of the whole project was completed, and then the apprentice worked alone for six days. At this time, the project still has 65438+.
79. Students in five classes of Grade Six planted 65,438+000 trees. As we all know, the number of trees planted in each class is different, and the ranking from the most to the least is just 1, 2, 3, 4 and 5 classes. It is also known that the number of trees planted in 1 is the sum of the number of trees planted in Class 2 and Class 3, and the number of trees planted in Class 2 is the sum of the number of trees planted in Class 4 and Class 5.
80. A runs 13 km per hour, B runs 1 1 km per hour, and B runs 20 minutes longer than A. As a result, B runs 2 km longer than A. How many kilometers did B run?
8 1. There are two cylindrical containers, A and B, with the same height and inner diameters of 6 cm and 8 cm respectively. Container A is full of water and container B is empty. All the water in container A was poured into container B, and the water depth in container B was measured to be 2 cm lower than 7/8 of the container height. What is the height of the container?
82. The cargo 104 tons is transported by truck with a load of 9 tons. It is known that a car needs 1 hour for each round trip. In fact, the car loads 1 ton every time, so it can be completed several hours in advance.
83. On the first day, master and apprentice processed 225 parts, and the next day, new technology was adopted. The number of parts processed by the master increased by 24% compared with the first day, and the number of apprentices increased by 45%. Two people processed 300 parts. How many parts did the master process the next day? How many parts did the apprentice process?
84. Struggle Primary School organizes sixth-grade students to go camping and training in Baihua Mountain, and the journey is increased by 2 kilometers every day. I went for four days and came back for three days. How many kilometers is the school from Baihua Mountain?
Comprehensive Training of Mathematical Application Problems in Primary Schools (04)
85. The standard for charging electricity in a certain place is: the monthly electricity consumption does not exceed 50 degrees, and 50 points are charged for each degree; If it exceeds 50 degrees, the excess will be charged at 80 points per degree. Every month, user A pays 3 yuan and 30 cents more than user B. How many kWh did users A and B use this month?
86. Master Wang plans to process a batch of parts in two hours. When there were 160 parts left, the machine broke down and the efficiency was lower than before 1/5. As a result, the task was completed 20 minutes later than originally planned. How many parts are there in this batch?
87. Mom gave Honghong some money to buy New Year cards, including three kinds of cards: A, B and C. Each card of A is 1.20 yuan. How much did Mom give Hong Hong to buy one card instead of eight cards B and six cards B? How much is the second card?
88. An old man has five sons and three houses. Before he died, he made a will and gave three houses to his three sons. As compensation, the three sons who were assigned to the house each took out 1.200 yuan and divided it equally among the two sons who were not assigned to the house. Everyone says this distribution is fair and reasonable, so how much is each house worth?
89. Xiaoming and Xiaoyan have fewer than 20 picture books. If Xiaoming gives Xiaoyan an A, Xiaoming's picture book is twice as big as Xiaoyan's. If Xiaoyan gives it to Xiao Amin, Xiao Ming's picture book is three times as big as Xiaoyan's. How many picture books do Xiaoming and Xiaoyan have?
90. There are three kinds of balls *** 160. If 1/3 of the red ball, 1/4 of the yellow ball and 1/5 of the white ball are removed, 120 remains. If 1/5 of the red ball, 1/4 of the yellow ball and 1/3 of the white ball are removed, 1 16 remains. How many yellow balls are there? (2) How many red balls and white balls are there?
9 1. My father, brother and sister are all 64 years old now. When my father was three times older than my brother, my sister was 9 years old. When my brother was twice as old as my sister, my father was 34 years old. How old are they now?
92.B is between A and C, and A delivers letters from B to A.. 10 minutes later, B delivers another letter from B. 10 minutes later, C found that A and B had just reversed the two letters, so he rode from B to catch up with A and B in order to transfer the letters. It is known that a and b have the same speed.
93. There are 94 workers in Workshop A and Workshop B, processing 1998 bamboo chairs every day. Due to different equipment and technology, each worker in Workshop A can only produce 15 bamboo chairs per day, while each worker in Workshop B can produce 43 bamboo chairs per day. How many more bamboo chairs does Workshop A produce every day than Workshop B?
94. It takes 10 minutes for Party A to go home from school, and 14 minutes for Party B. It is known that the distance for Party B to go home is 1/6 longer than that for Party A, and Party A walks 12 meters longer than that for Party B every minute. So how many meters is the distance for Party B to go home?
Comprehensive Training of Mathematical Application Problems in Primary Schools (05)
95. The cost of a commodity per unit of 72 yuan was originally sold at a fixed price, and it can sell 100 pieces every day, and the profit is 25% of the cost. Later, when it was sold at 90% of the fixed price, the daily sales volume increased to 2.5 times. According to this calculation, how many yuan does the daily profit increase?
96. The speed ratio of the two trains A and B is 5: 4. The second train leaves from Mile Mile for Station A.. When it is 72 kilometers away from Miley Miley, the first train goes from Station A to Miley Miley Miley. The ratio of the distance between the two trains is 3: 4, so what is the distance between Station A and bilibili?
97. There are 35 monkeys, big and small, who go to pick peaches together. In the absence of the Monkey King, a big monkey can pick 15kg and a small monkey can pick 1 1kg in an hour. When the Monkey King is present to supervise, each monkey, regardless of size, can pick 12kg per hour.
98. There are first prize and second prize in the math contest. It is known that (1) the proportion of winners in schools A and B is 6: 5. (2) The sum of the winners of A and B schools in the coming year accounts for 60% of the total winners of the two schools. (3) The proportion of winners in schools A and B is 5: 6. Ask a school to win the second prize.
99. It is known that the walking speed ratio of Xiaoming and Xiao Qiang is 2: 3, and that of Xiao Qiang and Xiaogang is 4: 5. It is known that Xiao Gang walks 420 meters more than Xiao Ming in 10 minute, so how many meters does Xiao Ming walk less than Xiao Qiang in 20 minutes?
100. It was originally planned to process 15 pieces every day, which can be completed in a few days. When 3/5 of the processing tasks are completed, the efficiency is improved by 20%. Results The task was completed 10 days in advance. How many parts are there in this batch?