a) M20 grade R.C.C concrete with 2% steel including formwork and reinforcement

b) Internal Plastering in CM 1:5

M20 grade R.C.C concrete with 2% steel including formwork and reinforcement

Consider 10m³ of wet Volume of concrete

For dry volume add 30%

$Q1=10+\bigg(\frac{30}{100}×10\bigg)=13m³$

Add 20% for wastage

$Q2=13+\bigg(\frac{20}{100}×13\bigg)=15.6 m³$

∴Dry Volume = 15.6 m³

1. Cement Quantity $=\frac{\text{Volume of concrete}}{\text{Sum of proportions}}=\frac{15.6 }{1+1.5+3} \\ =81.82m²$

No. of bags $=\frac{2.48}{0.0347}=81.82m²$

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