Answer Posted / sandesh parab

simple method
calculation for m20 for /1 m3
1.51 is Bulk Density and Specific Gravity cement powder.
1.54*1/1+ 1.5 + 3(cement+sand+agg.) =0.2745,
0.2745/0.035 =7.84 say 8 bags.

same calculation try for m10,15,25,30

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