2. The circumference of the bottom of the conical wheat pile is 12.56m and the height is1.2m. If the wheat weighs 500kg per cubic meter. How many tons does this pile of wheat weigh?
What is the area of a circle with a length of 8 cm and a width of 4.56 cm, which is equal to the circumference of this rectangle?
The area of a triangular land is 0.8 hectares, its bottom is 400 meters, and its height is how many meters?
A piece of white cloth is a square with a side length of 2 meters, and it is cut into an isosceles right triangle with a right angle and a side length of 2 meters. How many pieces can I cut at most?
6. Use 12.56 decimeter long lead wire to form a square and a circle respectively. How much is the area of a circle larger than that of a square?
7. Xiaohong read a story book and read 54 pages in 3 days. According to this calculation, how many days will it take to finish the book with 162 pages? (Use proportional solution)
8. There is an isosceles triangle whose two angles have a degree ratio of 1: 2. What triangle can this triangle be classified into by angle?
9. After the weaving factory finishes processing a batch of cloth, it takes Party A 16 days to cooperate, 20 days for Party A to do it alone, and Party B has to weave 600 meters every day. How many kilometers is this batch of cloth?
10, Party A and Party B drive in the opposite direction from the same place. Party A leaves at 6: 00 p.m. at a speed of 40,000 meters per hour. Party B left at 4 am the next day. 10 hour later, the distance between the two cars is 1080km. What's the speed of car B?
1 1. Machine Tool Factory manufactures a machine tool, and each machine uses 1.5 tons of steel, which actually saves 0.25 tons. Therefore, more 10 sets were produced than originally planned. How many machine tools were planned to be built?
12. Xiao Wang bought a batch of toothbrushes with a wholesale price of 0.35 yuan and a retail price of 0.40 yuan. When there were 200 pieces left to sell, Xiao Wang calculated that after deducting all costs, he had already made a profit of 200 pieces. How many toothbrushes did the shop buy?
13. Salt is completely dissolved in water and becomes brine. It is known that the weight ratio of salt to water in brine is 1: 10. How many kilograms of water should I add to 500 grams of salt?
14, a highway was built, and 20% of it was built five days ago. According to this calculation, how many days will it take to complete this road?
15, the original price of a washing machine 1450 yuan, is now reduced by 20%, but the price is still higher than the cost 1/9. How much is this washing machine?
16. The actual investment in building a new road is10.588 million yuan, which is 210.20 million yuan less than the original plan. What percentage was saved?
17. it takes 10 hour for team a to complete a project alone, and 15 hour for team b. Now Group A will work alone for 2 hours, while everyone else in Group B is working. How many hours will it take to finish this task?
18, Xiaolin goes to school from home at 7: 30 in the morning and walks 50 meters every minute. I just arrived at the school gate and found that I didn't bring my math book. I immediately went back the same way and walked 70 meters per minute. It was exactly 7: 54 when I got home. How many meters is Xiao Lin's home from school?
19, a cuboid warehouse, about 9 meters long from the inside. 6 meters wide and 5 meters high. If you put it in a 2-meter-long cubic wooden box, how many can you put at most?
20. The accountant of a factory found that the cash was 273.6 yuan more. After the audit, it was found that the decimal point of an expenditure was wrong. How much is this?
2 1. A paper mill carried out household saving activities, saving 1.44 tons of coal every day. If 3 kilograms of coal can generate 7.5 degrees of electricity, how many degrees of coal can be saved every day?
22. The decimal point of a certain number is shifted to the left by one place, which is 4 1.4 less than the original number. What was the original number?
23. The area of a triangle is18cm2, its base is12cm, and how many centimeters is its height?
24. A box of soap was distributed to workers in a workshop, with an average of 0/2 piece per person/kloc. If it is only distributed to female employees, the average person can get 20 pieces; If it is only distributed to male employees, how much can each person get?
25. The profit of a commodity is 20% of the cost. If the profit is increased to 30%, how much should the selling price be increased?
26. There is an oil mill that squeezes oil. 100 kg rapeseed can squeeze out 38 kg oil. How many kilograms of rapeseed does it take to squeeze 1 kg oil? 1 kg rapeseed can squeeze out how many kilograms of oil?
27. Fold the 48 cm long iron wire into a right triangle with the ratio of three sides of 3: 4: 5, and find the area of this right triangle.
28. Xiaohong's family has a barrel of oil, which weighs 8 kilograms. Half of it is used, and the barrel weighs 4.5 kilograms. How many kilograms of crude oil?
29. It takes 8 days for Team A and 10 km for Team B to build a10 km road ... How many days does it take for the two teams to repair together now?
30. The area of rectangular flower bed is 6 square meters. If the length is increased by 1/3 and the width is increased by 1/4, how many square meters is the area now more than before?
I understand you, I am also a graduate student, and mine is an Olympiad, which is still easy to make mistakes!