Answer / palguna

The proportions of
cement-1 ,sand -2 aggregate-4, the sum of total aggregates is 7
the volume of wet cement concrete is 1.54 to 1.57
then the solution is cement = 1x1.57x1440/7= 322.57 kg
(here 1440 is density of cement 
for sand = 2x1.57/7=0.4485 cum
aggregate = 4x1.57/7=0.897 cums

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