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

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• 1. 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?
• 2. 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?
• 3. 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?
• 4. 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
• 5. 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
• 6. 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?
• 7. 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?
• 8. 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
• 9. The bottom area of a cuboid is 56 square centimeters, and its height is 8 centimeters. How many cubic centimeters is its volume
• 10. A cuboid has a width of 8 cm, a surface area of 36 square cm and a volume of 72 cubic cm?
• 11. 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
• 12. 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?
• 13. 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?
• 14. For 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? Formula
• 15. A kind of concrete, the ratio of cement, sand and stone is 2:3:5, there are 7.5 tons of sand, if all of them are used, how many tons of such concrete can be mixed?
• 16. 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?
• 17. There is a rectangular steel plate with a length of 200cm, a width of 100cm and a thickness of 3cm. After forging, the width does not change and the length increases by 20%, so the thickness of the rectangular steel plate after forging is thicker It's about the intermediate process
• 18. A 200 cm long, 100 cm wide, 1 cm thick steel plate, after forging, the width does not change, and the length increases to 320 cm. What is the thickness of the steel plate after forging? (answer with the equation of one variable once)
• 19. A 200 cm long, 100 cm wide and 1 cm thick steel plate, after forging, has the same width and 60% increase in length. What is the thickness of the steel plate after forging?
• 20. A 200 cm long, 100 cm wide, 1 cm thick steel plate, after forging, the width does not change, the length increases to 320 cm, what is the thickness of the forged thick steel plate Linear equation of one variable