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

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

If x parts of cement, sand and stone are used respectively, then if the sand is used up, it is 3x = 120t, and the solution is x = 40t; then the cement used out is 2 * 40 = 80t, and the remaining 40t; if the stone is used out, it should be 5 parts, 5 * 40 = 200t, and the difference is 80t