2. The distance between A and B is 300 kilometers. Car A starts from A for 24 kilometers, and then car B drives across from B. It is known that car A drives 40 kilometers per hour and car B drives 52 kilometers per hour. If car A leaves at 8 a.m., two cars meet.
What time is it now?
Our shop has delivered a batch of washing machines and color TV sets. There are three times as many color TV sets as washing machines. Now, on average, 18 washing machines and 15 color TVs are sold every day. After all the washing machines were sold out, there were still 120 color TV sets that were not sold and were shipped for washing.
How many washing machines and color TVs are there?
Wang practices at a speed of 20 kilometers per hour. After a short journey, immediately return to the original starting point along the original road at a speed of 30 thousand per hour. What is the average speed of this round trip?
The grain store delivered 3700 kilograms of rice and flour. It is known that the flour shipped out is twice as much as rice 100 kg. How many kilograms of rice and flour are shipped?
6. A group of young pioneers crossed the river by boat. If each ship takes 15 people, there are still 9 people left. If each ship takes 18 people, there are 1 ships left. How many ships are there?
7. There are 50 watercolors and 80 crayons in the art exhibition held by the school. How much is crayon drawing more than watercolor painting? How much is watercolor painting less than crayon painting?
8. In the model airplane competition, the first model airplane flew 480 meters less than the second one. It is known that the speed of the first model airplane is faster than that of the second model airplane 1 m/s, two models.
The flight time of the plane in the air is 12 minutes and 16 minutes respectively. How far did these two model planes fly?
9. The circular runway is 400 meters long. Party A travels 80 meters per minute and Party B travels 120 meters per minute. Both Party A and Party B leave their jobs at the same time. How many minutes did they first meet? If we start in the opposite direction, how long will it take to meet?
10. Party A and Party B set out from A and B at the same time and walked towards each other. Three hours later, they met on the road. It is known that A and B are 24 kilometers apart, and the speed ratio of A and B is 2:3. Ask Party A and Party B how many kilometers they walk per hour.
1 1. It is known that the distance between A and B is 290 kilometers. At present, a car travels from place A to place B at a speed of 40 kilometers per hour. Thirty minutes after the departure, another motorcycle traveled from B to A at a speed of 50 kilometers per hour. Ask the motorcycle.
The car walked for a few hours before it met a car.
12. Xiaodong went to the fruit shop and bought 3 Jin of apples and 2 Jin of pears * * * paid 15 yuan. 1kg apples are more expensive than 1kg pears in 0.5 yuan. How much are apples and pears per kilogram?
13. Two cars, A and B, leave from A and B at the same time, respectively, and go in opposite directions. A travels 50 kilometers per hour, B travels 40 kilometers per hour, and A reaches the midpoint 1 hour earlier than B. How many hours does it take for A to reach the midpoint?
14. Party A and Party B set out from A and B at the same time, face to face, and meet two hours later. If A starts from place A and B goes in the same direction at the same time, then A will catch up with B after 4 hours. The armor speed is known as15 km/h.
Find the speed of B.
15. The base of the triangle is 4.3 cm long and the area is 17.2 cm. How many centimeters is its height?
16. Xiaoming was 28 years younger than his father last year, and his father is 8 times older than Xiaoming this year. How old is Xiaoming this year?
17. There are 365 pear trees and peach trees in the orchard, and there are 5 peach trees, twice as many as pear trees. How many pear and peach trees are there in the orchard?
18. A car walked for 3 hours on the first day and 5 hours on the second day. The first day was 90 kilometers less than the second day. How many kilometers per hour?
19. The distance between a and b is1000m. Xiaohua goes from A, and Xiaoming goes in the opposite direction at the same time. Xiaohua walks 80 meters per minute and Xiaoming walks 45 meters per minute. How many minutes do two people meet?
20. The distance between the two places is 2 10 km. Cars A and B leave the two places at the same time and meet in 3.5 hours. Car A travels 28 kilometers per hour. How many kilometers per hour is the B train?
21.The distance between a and b is 189 km. An express train travels 72 kilometers per hour from A to B, and a slow train travels 54 kilometers per hour from B to A. If both trains start at the same time, the distance between them will be 3 1.5 kilometers in a few hours.
?
22. A road maintenance team will build a road1680m long. Has been built 15 days, with an average of 60 meters per day. How many meters will be built every day after the remaining 12 days are completed?
23. The school bought 6 tables and 12 chairs, and * * * paid 2 15.40 yuan for each chair, 7.5 yuan. How much is each table?
24.25 baskets of radishes and 32 baskets of cucumbers were delivered from the market, weighing 1870 kg. It is known that each basket of radishes weighs 30 kilograms, and how many kilograms does each basket of cucumbers weigh?
25. Make the same clothes with two pieces of cloth. The first piece of cloth is 75 meters long, the second piece of cloth is 100 meters long, and the first piece of cloth is less than the second piece of cloth 10 sets. How many meters of cloth does each suit use?
26. Hong Guang Farm Tools Factory produced 600 farm tools in May, 25% more than in April. How many farm tools did it produce in April?
27. Red Star Textile Factory has 174 female employees, which is 6-3 times less than that of male employees. How many employees are there in the factory?
28. Baylor Primary School has 86 students in the third grade, four fewer than the second grade. How many students are there in Grade Two?
29. There are 630 boys in one school, with a ratio of 7: 8. How many girls are there in this school?
30. Zhang Hua read a story book. On the first day, 15% of the books were missing 4 pages. At this time, the ratio of read pages to remaining pages is 1: 7. How many pages does this story book have?
3 1. A bookshelf has two layers, and the books on the upper layer are three times as large as those on the lower layer; If you take 30 books from the upper floor and put them on the lower floor, the number of books on the two floors is exactly the same. How many books are there on each shelf?
32. There are 89 books on the first floor, less than on the second floor 16. The books on the third shelf are 1.5 times as many as those on the first and second shelves. How many books are there on the third floor?
The ratio of the number of art books to the number of other two books is 1: 5, and the reference books and literature books are 180. How many books are there in the bookcase?
33. There are two students, A and B. After each student donated 15 yuan to the people in the disaster area, the ratio of the remaining money A to B is 3: 4. B how much money did you save?
34. Xiaohong and Xiao Fang both saved some pocket money. The ratio of their savings is 5: 3. In the donation activity of "supporting the disaster area", Xiaohong donated 26 yuan and Xiao Fang donated 10 yuan, and the remaining money was equal. How much money does Xiaohong have?
Money?
35. The school bought back 3 15 seedlings, and plans to distribute them to middle and senior grades for planting according to the ratio of 3: 4. How many more trees are planted in the senior grade than in the middle grade?
36. A total of 180 plants were planted in the third, fourth and fifth grades, and the planting ratio in the third, fourth and fifth grades was 3: 5: 7. So how many trees are there in three grades?
37. The school plans to divide the task of planting trees into six grades and other grades according to the ratio of 5: 3. Results The number of trees planted in the sixth grade accounted for 75% of the whole school, 20 more than planned. How many trees does the school plan to plant?
38. A glass of 80 grams of salt water contains 4 grams of salt. Now, how many grams of salt or water should be added to make the ratio of salt to water in this glass of brine become 1∶9?
39. The fruit shop delivered 540 kilograms of apples and pears, and the weight ratio of apples and pears was 12: 15. How many kilograms of pears were shipped?
40. The fruit shop brought 300 Jin of oranges, grapes are 50 Jin more than oranges, apples are twice as many as grapes, and how many Jin are apples more than oranges?
4 1. Distribute 960 kg of feed to two professional chicken farmers, A and B, at a ratio of 7: 5. How many kilograms of feed do specialized households get more than specialized households?
42. The rice originally stored in warehouse A and warehouse B is equal. At present, there are 0/4 tons of rice from warehouse A and 26 tons of rice from warehouse B. At this time, the surplus rice in warehouse A is 40% more than that in warehouse B. Warehouse A and warehouse B were originally stored separately.
How many tons of rice?
The school playground is a rectangle with a circumference of 280 meters. The aspect ratio is 4: 3. What is the length and width of this playground?
44. Bibo Kindergarten has a clever and beautiful rectangular flower bed with a circumference of 64 meters and an aspect ratio of 5: 3. How many square meters is this flower bed?
45. On a large-scale map, the distance between A and B is 5 cm. What is the actual distance between a and b?
46. A toy factory produces a batch of children's toys. It was originally planned to produce 120 pieces per day, which will be completed in 75 days. In order to welcome Children's Day on June 1st, it actually took only 60 days to complete the task. How many toys are actually produced every day?
47. Two furniture factories, A and B, produce single tables and chairs with the same specifications. A can produce 1 0,800 tables and B can produce 1 0,500 chairs. One * * can produce 65,438+0,500 sets of desks and chairs. Now the two factories are jointly producing, and after reasonable safety,
Row, try to give full play to their respective strengths. How many more tables and chairs can these two factories produce each month than in the past?
48. The construction site needs to transport 65,438+022 tons of cement. After 18 times in a 4-ton truck, how many times did the rest be transported in a 2.5-ton truck?
49. In April, the air conditioning factory produced1.80000 air conditioners, which increased by 10% in May compared with April. How many air conditioners were produced in April and May?
50. The master and the apprentice cooperate to produce a batch of parts, with the master producing 40 pieces per hour and the apprentice producing 30 pieces per hour. For example, the apprentice just paid 450 yuan when he finished the task. How many of these parts are there?