For a kind of concrete, the ratio of cement, sand and stone is 2:3:5. To mix 2000 kg of such concrete, how many kg of cement, sand and stone are needed?

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• 1. The ratio of cement, sand and stone in 2010 Guangzhou Asian Games Theme gymnasium is 2:3:5. Now there are 120 tons of cement, stone and sand If you want to use up 120 tons of sand, how many tons of cement are left? How many tons of stones are left? I don't understand the meaning. Let's talk about the solution first and then the formula. It's urgent! It's due tomorrow
• 2. The bottom area of a cuboid is 56 square centimeters, and its height is 8 centimeters. How many cubic centimeters is its volume
• 3. A cuboid has a width of 8 cm, a surface area of 36 square cm and a volume of 72 cubic cm?
• 4. The cuboid is 12 cm long and 8 cm high. The sum of the areas of the two sides of the shadow is 200 square cm. What is the surface area of the cuboid?
• 5. A cuboid is 8 cm long, 5 cm wide and 6 cm high. Its surface area is () square cm and its volume is () cubic cm
• 6. A cylindrical bucket has a volume of 54 cubic decimeters and a bottom area of 18 square decimeters. It holds one third of a bucket of water. How high is the water surface
• 7. A rectangle, the bottom area is 54 cubic decimeters, 12 decimeters high, calculate the volume of the cuboid
• 8. It is known that the height of a cuboid is 24 cm and the volume is 19.2 cubic decimeters. What is the bottom area of this cuboid? Don't use equations,
• 9. A cube has a surface area of 96 square decimeters and a volume of 1______ Cubic decimeter
• 10. 1. The surface area of a cube is 54 square decimeters. If the edge length is reduced by 1 decimeter, the volume will be reduced by () cubic decimeter 2. It takes 20 hours for Master Li to make a batch of parts, and 30 hours for his apprentice to do it alone. How many hours can master apprentice cooperation complete two-thirds of this batch of parts? 3. There is a cone with a volume of 157 cubic centimeters and a bottom radius of 2 centimeters. What is the height of the cone? 4. A factory has 36 tons of coal, which has been burned for 12 days, with an average of 1.2 tons of coal per day. How many days can the remaining coal be burned
• 11. The ratio of cement, sand and stone is 2:3:5. To mix 2.4 tons of such concrete, when the sand is used up, how many tons more cement? How many tons more stone?
• 12. A kind of concrete, the ratio of cement, sand and stone is 2:3:5, in which 3 tons of cement is used. How many tons of sand and stone are used respectively It's a formula
• 13. A kind of concrete is made up of cement, sand and stone in the ratio of 2:3:5. Now, how many cement, sand and stone are needed to make 2 tons of this kind of concrete
• 14. The mass ratio of cement, sand and stone for a concrete is 2:3:5. Now there are 12 tons of each of the three ingredients. If the sand is used up, how many tons of cement are left? How many tons of stones are missing?
• 15. Cement, stone and sand are 80 tons each. Concrete is mixed with cement and stone according to the mass ratio of 8:5:3. The cement is just used up. How many tons of stone and sand are left?
• 16. Challenger: the mass ratio of cement, sand and stone of a kind of concrete is 2:3:5. How many tons of cement, sand and stone are needed to prepare 20 tons of concrete?
• 17. A kind of concrete, which is made of cement sand and stone in the ratio of 2:3:5. Now it takes thousands of grams of cement sand and stone to mix 6000 kg of this concrete
• 18. Construction workers use 2 points of cement, 3 points of what and 5 points of stone to make a kind of concrete. To make 6000 kg of such concrete, they need cement, sand and stone
• 19. Workers use 5 parts of cement, 3 parts of sand and 2 parts of stone to prepare a kind of concrete. Now they need to prepare 6000 kg of concrete. How many kg of cement, sand and stone do they need?
• 20. The ratio of cement, sand and stone is 2:3:5. How many tons of cement, sand and stone are needed to mix 20 tons of such concrete?