The construction team compounded a kind of concrete with cement, yellow sand and stone in the ratio of 2:3:5. It is known that the cement is 7.2 tons less than stone. So, how many tons of materials are needed to prepare this kind of concrete?

The construction team compounded a kind of concrete with cement, yellow sand and stone in the ratio of 2:3:5. It is known that the cement is 7.2 tons less than stone. So, how many tons of materials are needed to prepare this kind of concrete?

7.2 ÷ (5-2), = 7.2 ÷ 3, = 2.4 (T); cement: 2.4 × 2 = 4.8 (T); yellow sand: 2.4 × 3 = 7.2 (T); stone: 2.4 × 5 = 12 (T); 4.8 + 7.2 + 12 = 24 (T); a: a total of 24 tons of materials are required to prepare this kind of concrete