There are two piles of sand. Pile a is 1.5 tons less than pile B. after 9.9 tons are transported from pile B, the sand in pile B is 80% of pile A. how many tons of sand is there in pile B?

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• 1. A pile of sand weighs 700 tons. A truck transports 5 tons each time. How many times do seven vehicles need to transport?
• 2. There is a pile of sand. The first time it carries away two fifths of it, and the second time it carries away the remaining two fifths?
• 3. A cone-shaped sand pile has a bottom circumference of 31.4m, a height of 7.2m and a sand weight of 1.5 tons per cubic meter. How many times can it be transported by a 6-ton truck?
• 4. A conical sand pile covers an area of 20 square meters and is 6 meters high. Each square meter of sand weighs about 1.7 tons. If it is transported by a car with a carrying capacity of 5 tons How many times can this pile of sand be transported?
• 5. Four trucks transport 54 tons of goods in three times in a warehouse by truck. According to this calculation, how many times do you need to transport 45 tons of goods by five trucks? How many trucks do you need to transport 72 tons of goods by five trucks? How many tons of goods can you transport by three trucks by six times? (12 points) Passenger cars and freight cars start from 540 kilometers away at the same time, and travel in opposite directions. Passenger cars travel 60 kilometers per hour, which is twice the speed of freight cars. How many hours later do the two cars meet on the way? (7 minutes) Party A and Party B set out at the same time from two places with a distance of 6000 meters, and they met on the way 20 minutes later?
• 6. One part of cement, two parts of yellow sand and three parts of gravel are used to prepare a kind of concrete. At present, 6 tons of concrete, 10 bags of conch cement and 50 kg of cement are needed?
• 7. 15 tons of cement yellow sand stones are transported from the construction site, and a kind of concrete is made according to the ratio of 2:3:5
• 8. The weight of cement on the construction site is two-thirds of that of yellow sand. Twelve tons of cement and fifteen tons of yellow sand are used every day. After a few days, it will be followed up The cement is just used up. There are 12 tons of yellow sand left. How many tons of original cement are there on the construction site?
• 9. There is a batch of cement on the construction site. 30% of the total cement is used in the first time and 60 tons are used in the second time. This is the remaining two fifths. How many tons of cement are left?
• 10. There is a pile of cement on the construction site. After three eighths of it was used, 26 tons of cement was transported. This pile of cement is one sixth more than the original one. How many tons of cement was there in the original pile?
• 11. The construction site needs 63 tons of sand. How many times does a 3-ton truck need to transport it after six times To solve the equation oh. There are relations oh
• 12. The sand pit of Chaoyang primary school is 2.5m long, 1.5m wide and 6dm deep. How many tons of fine sand are needed to fill the sand pit, which weighs 1.5 tons per cubic meter?
• 13. The school has a sand pit which is 43 decimeters long, 34 decimeters wide and 5 decimeters deep. After it is filled with sand, what is the volume of sand in the sand pit? If each cubic decimeter of sand weighs 1.4 kg, how many kg does the sand weigh?
• 14. The school plans to dig a sand pit on the playground for students to practice long jump. According to the regulations, the sand pit is 5m long and 2m wide. There are 7 cubic meters now. How many decimeters is the sand pit dug Deep energy just fills up?
• 15. In the school playground, a rectangular pit with a length of 4m, a width of 3M and a depth of 5 decimeters was dug. If the sand weight per square meter is 1.7 tons, how many tons of sand should the school buy to fill the pit .
• 16. A rectangular sand pit is 5 meters long, 4 meters wide and 0.8 meters deep. How many square meters does this sand pit cover? If every cubic meter of yellow sand weighs
• 17. The sports team dug a rectangular sand pit, 4 meters long, 1.5 meters wide and 0.6 meters deep. How many square meters does this sand pit cover? How many cubic meters of sand do you need It's just full
• 18. To transport a pile of sand, we transported two thirds of the total in the first time and one fourth of the total in the second time. We transported 20 tons more in the first time than in the second time. How many tons are there in this pile
• 19. The density of oxygen in an oxygen cylinder of a hospital is 6kg / M and 179; when 1 / 3 mass of oxygen in the cylinder is used, the density of gas in the cylinder is 0 A. 6 kg / M; b.4 kg / M; C.2 kg / M; D. can't be sure, please tell me how to solve the problem
• 20. At the construction site, 75 tons of sand are transported by large and small trucks with a load of 8 tons and 5 tons, and several large trucks and small trucks are used respectively fast