Cement,sand and aggregate Quantity in M20 Grade concreat

Cement qnty in 1cum M20 grade concreat

Ratio of M20 grade
Ratio of M20:- 1:1.5:3

Formula :- cement qnty=1.52/(a+b+c)
Here a=1, b=1.5, c=3
So
     1.52/(1+1.5+3) = 0.276 cum cement
Vol. Of 1 cement bag.= .0334
So cement in bags= 0.276/.0334= 8.2 bags

Now sand :- 0.276×1.5= 0.42cum
Now aggregate:- 0.276×3= 0.828cum

Note:- This qunty of cement is exceeding                   from design qnty of cement. It will                 come to 350 kg in weight batching.