Length of long wall = 3.5+3.5+0.30+0.30×2 = 15.2m
Length of short wall = 3×4.30 = 12.9m
Total length of wall = 28.1m
Now we have calculated deduction of Windows, Doors and Ventilators:
Doors = 2.1×1.05×0.30(2) = 1.32 cum
Windows = 1.2×1.2×0.30(2) = 0.86 cum
D.V = 1.5×0.45×0.30(2) = 0.28 cum
W.V = 1.20×0.45×0.30(2) = 0.32 cum
Total deduction = 2.78 cum
Go through the following video tutorial to learn the complete process
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Click Here To See How To Calculate Quantity Of Cement, Sand, And Water In Mortar Of 1:4