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1 cubic meter of concrete has a wight of 2400 kg. 15% of the concrete is water. The rest of the ingredients are cerment, sand and stone. The weights are in a ratio of 1:2:5. Work out the weight of cement, sand and stone in the 1 cubic meter of concreteHelp me please i have a test coming up

Respuesta :

Water: 2400*15%= 360 kg

Let the ratio be x,2x,5x.
x+2x+5x=100%-15% (water)
=>8x=85%
=>x=85/8
=>x=10.625%
2x=21.25%
5x=53.125%

Cement: 2400*10.625%= 255 kg

Sand: 2400*21.25%= 510 kg

Stone: 2400*53.125%= 1275 kg

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