The ratio of cement, sand and stone is 2:3:5. The existing raw materials are 20 tons each. When all the sand is used up, how many tons more cement and stones need to be added?

20: Cement = 3:2, the amount of cement is: 13.3 tons of cement 20-13.3 = 6.7 tons
20: Stone = 3:5, stone consumption: 33.3 tons, stone difference 33.3-20 = 13.3 tons

The construction team uses cement, sand and stones to make concrete in a ratio of 2:3:5. If there are 10 tons of these three materials, when all the cement is used up

Cement 10 tons
Sand 10 * 3 / 2 = 15 tons
Another 15-10 = 5 tons
Stone 10 * 5 / 2 = 25 tons
Another 25-10 = 15 tons

A worker uses 2 parts of cement, 3 parts of sand and 5 parts of stone to prepare concrete. If 8000 kg is prepared at a time, how many kg of cement, sand and stone are needed?

Cement, sand and stone = 1600:2400:4000 kg

For a kind of concrete, 3 parts of sand, 2 parts of stone and 1 part of cement are mixed together, and the sand accounts for 30% of the concrete_ The stone is less than sand (& nbsp; & nbsp; & nbsp;) (& nbsp; & nbsp;). If 2 tons of cement is needed, it can be mixed_ Tons of concrete

3 + 2 + 1 = 6 (parts) 3 △ 6 = 12 (3-2) △ 3 = 13; 2 △ 1 × 6 = 12 (tons) a: sand accounts for 12% of concrete, and stones are 13 less than sand. If 2 tons of cement are needed, 12 tons of concrete can be mixed. So the answer is: 12, 13, 12

The ratio of cement, sand and stone is 2:3:5. The existing raw materials are 20 tons each. When all the sand is used up, how many tons more cement and stones need to be added?