Answer Posted / suyog patil

for brick size 200mmx100mmx100mm (1:4) for 1cum
volume of 1 brick= 0.002
say 12mm thick mortar on brick layer
so volume of brick=0.00267 cum
No. of bricks in 1cum = 1/0.002 = 500 no. bricks
volume of bricks for 1cum = 500x0.00154=0.77 cum
volume of cement mortar 1-0.766=0.23cum
add 15% for waste=0.26 cum
add 30% for dry mortar of 0.3 cum = 0.34 cum
for cm 1:4 = 1+4=5
quantity of cement 1/5 x 1 x 0.34 = 0.068 cum
1 bag of cement = 0.035 cum
0.068/0.035 = 1.94 i.e 2 bag
sand =1/5 x 4 x 0.34= 0.27 cum

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