Answer Posted / srilingamoorthy

for M20 grade of concrete
Ratio 1:1.5:3
(i.e) cement : coarse aggregate : Fine Aggregate.
( jally ) ( sand )
1cubic metre cement = 1440KG
In the concrete 0.45% of the sand ratio is utilised for
cement.so for M20
= 0.45/3 X 1440
=0.15 X 1440
= 216Kg/cubicmetre
= 4.32Bags of cement/cubicmetre of concrete

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