Answer Posted / vikas patil

For 1 Cu.m Concrete (1:2:4)
Cement =1.52/(1+2+4)=.217 Cu.m=.217/.035=6.2 Bags
Sand=(1.52*2)/7=0.434 Cu.m
Agg.=(1.52*4)/7=.86 Cu.m
out of 0.86Cu.m of Agg use following Proportion of Agg.
20mm Agg=0.65*.86=.56 Cu.m(65%of 0.86Cum)
&
10mm Agg=0.35*.86=0.3 Cu.m(35%of 0.86Cu.m)

Summary=>
Cement=6.2 Bags,
Sand=0.434 Cu.m,
20mm Agg=0.56Cu.m,
10mm Agg.=0.30Cu.m

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