Question

A wall is 15 m long,30 cm wide and 4 m high is made of bricks each measuring 22*12.5*7.5 cm^2.If 1/12 of the total volume of the wall consists of mortar,how many bricks are there in the wall?

Answer 1

hey,
volume of wall=18000000cm3
1/12 volume=1500000 cm3
now volume for stones to fill=16500000
volume of 1stone=22*12.5*7.5
no of stones=volume of wall/volume of stone
so no. of stones=80
hope it helps