Cement,sand and aggregate Quantity in M15 grade concreat

Cement qnty in 1cum in M15 grade concreat:--

Ratio of M15 grade
Ratio of M15:- 1:2:4

Formula :- cement qnty=1.52/(a+b+c)
Here a=1, b=2, c=4
So
     1.52/(1+2+4) = 0.217cum cement
Vol. Of 1 cement bag.= .0334
So cement in bags= 0.217/.0334= 6.4 bags

Now sand :- 0.217×2= 0.43 cum
Now aggregate:- 0.217×4= 0.87 cum