9. A cylindrical vase with a bottom radius of 5 cm and a height of 20 cm. The outer box of this vase is a rectangular box. How many square centimeters of cardboard does it take to make such a package?
10. The volume of the cone is 3 14 cubic decimeter, and the diameter of the bottom surface is 10 decimeter. What is its height?
1 1, a grain depot has three granaries, and granary A accounts for 25% of the total stored grain. If 16 tons of grain is taken out of warehouse C and put into warehouse A and 7.5 tons into warehouse B, the three granaries have equal grain storage. How many tons does this granary store?
12. Pony rides a bike across the bridge. The bridge length is1500m. The diameter of a bicycle tire is 5 decimeters. It rotates 30 times a minute. How many minutes does it take to cross the bridge? (Numbers are reserved as integers)
13. Put a bronze (completely immersed in water) in a square glass tank with a bottom length of 2m, and the water level will rise by 1 dm (ignoring the thickness of the glass).
(1) What is the volume of this bronze?
(2) If this bronze ware is cast into a cylinder with a base diameter of 10 cm, what is its height? (Numbers are reserved as integers)
14. Xiaogang scored an average of 92 in the first three math exams and 98 in the fourth. What is the average score of his four exams?
15, there are 240 students in bright primary school, and the number of experimental primary schools is 20 times more than that in bright primary school. How many students are there in two primary schools?
16. The distance between Party A and Party B is 225km, and the express train and the local train start from both places at the same time, with opposite directions. The express train travels 48 kilometers per hour and the local train travels 42 kilometers per hour. The express train leaves in a few hours and meets the local train.
17. This TV factory plans to produce 8000 color TV sets throughout the year. As a result, 60% of the planned color TV sets were completed in the first half of the year, and as much in the second half as in the first half. How much more color TV sets were actually produced than planned?
18, a science and technology book, read 15 pages every hour, and read it in 6 hours. How many pages will you read per hour on average if you finish it 1 hour in advance? (Use proportional solution)
19. This clothing factory processed 6,000 children's clothes in April, 20% less than that in May. How many pieces were processed in May?
There are 240 peach trees in the orchard. The number of apple trees is 80% of that of peach trees, belonging to pear trees. How many pear and peach trees are there?
2 1.A and b two trains leave from two places at the same time, which are at a distance of1050km. The train runs 80 kilometers per hour. 2.8 hours later, if the two trains are separated, how many kilometers will train B run per hour?
22. The ratio of the amount of money deposited by Party A and Party B in the bank is 5:3, because Party B later deposited 4,400 yuan. At this time, the money saved by Party A is equivalent to 75% of that of Party B, so how much money did Party A save?