A kind of concrete is made of cement, yellow sand and stones in the ratio of 2:3:5. How many tons of cement, yellow sand and stones are needed to prepare 500 tons of this kind of concrete?

A kind of concrete is made of cement, yellow sand and stones in the ratio of 2:3:5. How many tons of cement, yellow sand and stones are needed to prepare 500 tons of this kind of concrete?

Cement is 2 / (2 + 3 = 5) * 500 = 100 tons, same yellow sand 150 tons, stone 250 tons