Answer Posted / umair ahmad

unit of rate=300sft

thickness of plaster=12mm
wet volume of mortar=300*0.039=11.7cft
dry volume of mortar=11.7*1.27=14.85cft
ratio of cement=1:4(Assuming 1:4 ratio of mortar)
sum of ratio=1+4=5

quantity of cement=1/5*14.85=2.97cft.
2.97/1.25=2.376 Bags.
quantity of sand=4/8*14.85=7.425cft.

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