Three parts of concrete, sand, two parts of stone, cement together, how much sand accounts for concrete, how much less stone than sand? If 2 tons of cement is needed, how many tons of concrete
The size of the stone determines the amount of sand, generally 2 tons of cement with 14.5 tons of stone, 8.3 tons of sand
Cement stone sand each 60 tons, according to 5:3:2 mixing concrete, cement just used up, stone and sand each remaining how many tons?
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60 △ 5 = 12 (ton)
5-3=2
2 × 12 = 24 (tons)
5-2=3
3 × 12 = 36 (tons)
A: there are 24 tons of stones and 36 tons of sand left