2. A wine bottle, 30cm high (remember the bottleneck). The lower part is a cylinder. The height of the wine in the bottle is 15cm. Turn the bottle upside down, with the air part 10cm high. The volume of the whole wine bottle is () cm3.
When did the wall clock of Xiaohong's house ring several times? Call every half hour. One night, Xiaohong woke up and heard the wall clock strike. Not long after, it came again. After a while, it came again. Xiaohong wakes up at () and ().
The grain processing plant has 2 100 kg of rice and 525 kg of flour. Put them into sacks and flour bags respectively, with the same number of bags. It is known that each bag of rice weighs 75 kilograms more than flour, each bag of rice weighs () kilograms, and each bag of flour weighs () kilograms.
5. The apprentice needs 15 hours to produce a batch of parts, and the master produces 6 parts per hour, which takes 5 hours less than the apprentice. If two people produce these parts at the same time, the master will produce () and the apprentice will produce () when completing the task.
Xiaoming, Xiaohong and Wang Jun spent the same amount of money on homework papers. After buying it back, Xiaoming asked for 16 more than Wang Jun, so he made up 0.09 yuan for Wang Jun, and Xiaohong asked for 14 more than Wang Jun, but did not give Wang Jun 0.06 yuan and () yuan's homework papers.
7. A stationery store bought a batch of balls with the wholesale price of 0.1one in 5 yuan and the retail price of 0.2 yuan. When there are 20 balls left, you can make a profit by calculating the cost of the money you bought. 5 yuan, the stationery store bought () balls.
8. 2.8 yuan per catty of toffee, 3 per catty of chocolate.15 yuan. Now I bought 6 Jin of chocolate candy and several Jin of milk candy, with an average of 3 yuan per Jin. I bought () Jin of toffee.
9. The distance between Party A and Party B is 300 kilometers. Zhang Ming rode a motorcycle from Party A to Party B at a speed of 30km/h, and stopped for 3 hours on the way. In order to arrive at Party B on time, he doubled the speed after stopping, and stopped when he was 0/000 km away from Party A/KLOC-. ..
10. A factory originally planned to produce 400 farm tools every month. After technical transformation, the monthly output of 10 has exceeded 5% of the annual plan, and the monthly average output of 10 is ().
1 1. The clothing factory plans to make 3,250 sets of children's clothes, each with 7 feet of cloth. After completing the 20% plan, improve the cutting method, each set of cloth114, so that more sets of children's clothes can be made than originally planned.
12. There are many students in a school, with 5 fewer boys than 5/9 and more girls than 3/7 1 1. There are () boys and () girls in this school.
13. A farmer sells watermelons in the market. The first man bought half a watermelon, the second man bought half a watermelon, and the third man bought the last 15 watermelon. When the farmer went to the market, he took () a watermelon.
14. For a family, the age of members adds up to ***77 years old. Family members include father, mother, daughter and son. Father is four years older than mother, and daughter is three years older than son. Four years ago, all members were 62 years old. Now my father is (), my mother is (), my daughter is () and my son is ().
15. Young pioneers from three squadrons took part in tree planting activities. The number of trees planted by the first squadron accounts for 25% of the total. The planting ratio of the second squadron and the third squadron is 4: 5. The first squadron planted 84 fewer trees than the third squadron, and each squadron planted an average of () trees.
16. Several students plan to buy a football. If we share 2.5 yuan, it will be less than the football price 1.3 yuan. If everyone shares 3 yuan, there will be 1.2 yuan. One * * * has () students, and the price of football is () yuan, so it's just right for everyone to share () yuan.
17. Add a number to both sides of 73, so that four digits are multiples of 5 and 9. There are () such four digits, each of which is ().
18. The school held a sports meeting, and Xiaoming, Xiaogang and Xiaolong participated in the 100 meter race. When Xiao Ming walked halfway, Xiao Gang was 2 meters slower than Xiao Ming, and Xiaolong was 3 meters slower than Xiao Gang (the speed of three people remained the same) (1). When Xiaoming reached the finish line, Xiaolong was () meters away from the finish line. (2) It took Xiaoming 30 seconds to reach the finish line, and the speed of Xiaolong was () meters per second.
19. The road team has to build two roads, and the length of the first road is three-fifths of that of the second road. If the first road is built 240 meters and the second road is built 800 meters, the length of the two roads is equal. The first highway is () meters long and the second highway is () meters long.
20. Surround the cylinder with two pieces of paper. The first piece of paper is 2dm long and 1dm wide, and the second piece of paper is 3dm long and 2dm wide. The cylindrical volume of the second piece of paper is () times that of the first piece of paper.
2 1. There are conical cups and cylindrical cups. The ratio of their base radius is 2: 3, and the ratio of their height is 3: 5. Pour water into a cylindrical cup with a conical cup. Pour a few cups, the cylindrical cup is full, and there is 120cm3 water left in the conical cup. The volume of a cylindrical cup is () cm3.
22. Publish a set of books every five years. The sum of the first five publication years is 9795, and the first book in this series was published in ().
The distance between Party A and Party B is 600 miles. Two cars, one big and one small, travel from A to B at the same time. The bus arrived four hours earlier than the bus. When the bus arrives at Party B, the bus only travels 360 miles, the bus travels () miles per hour, and the car travels () miles per hour.
24. The distance between the two places is 125km, and two cyclists start from both places at the same time. The speed of A is 15km/h, and the speed of B is10km/h. A has a dog who started at the same time. The dog runs at 20km/h, and when it meets B, it runs to B, and the dog runs () km.
25. At 8: 00 a.m. on April 2nd, two ships A and B set out from two ports at the same time, one 2 1km/h and the other 18km/h, and the two ships will meet on April 4th17 8: 10/0. The distance between Party A and Party B is () kilometers.