Answer / vinay

if they give the give w/c ratio then we can calculate water quantity.
for eg if 0.3 is the w/c ratio then,
w/c=0.3
then 1 bag of cement contains 1.25cft so, 0.3*1.25= 0.375cft
1cft contains 28.34 litrs of water then 0.375*28.34=10.625 litres of water is required for 1 bag of cement, generally here for dry volume of concrete is taken as 1 and half times the wet volume i.e 1.54

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