Answer Posted / eng.mehboobullah

for calculating the volume of cement in this question it
also need thickess. we consider the thickness of the
plaster 0.5 inch = 0.04' thus the total volume will be 4cft.
this is the wet volume now multiplying it with constant
1.27 the dry volume will be 5.08
now sum of ratio is 5 according to the formula
1 x 5.08/5 = 1.01 cft one cement bag have volume
of 1.25 cft now dividing it on 1.25 we get
1.01/1.25 = 0.81 bags
in plaster the volume of cement depends on the thickness of
the plaster but normally it is adopted as 1/2" that is the
answer of both question change the thickness of the plaster
will change the value of volume of cement. thanks

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