Answer Posted / hari

for M15 proportion is 1:2:4
dry volume of concrete in 1 cum = 1.54
cement qty - 1.54/(1+2+4)*1 = 0.22cum
Fine Agg - 1.54/(1+2+4)*2 = 0.44cum
coarse Agg - 1.54/(1+2+4)*4 = 0.88 cum

check any proportion - (0.22+0.44+0.88) = 1.54cum

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