Answer Posted / sudiptodas

its simple
1st step to fined the volume of mortar
as per question
300 sft=27.28m*m
thickness of plaster= 12mm
so volume of plaster= 27.28*.012=.3336m3
this is wet volume.to transfer in to wet
.3336*1.54=.514
this is your total mortar
conceder 1:3 mix
so cement= .514/4=.128= 3.7 bags
sand .128*3=.384m3

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