Question

A wall 15 m long 30 cm wide and 4 m high is made of bricks , each measuring 22 cm ×12.5 cm × 7.5 if 1/12 of the total of wall consister of mortars, how many brick are there in wall ?

Answer 1

dimensions of the wall are L=15m=1500cm,B=30cm and H=4m=400cm
volume of the wall=LBH=18000000cc
volume of mortar=18000000/12=1500000cc
volume of each brick=lbh=22×12.5×7.5=2062.5cc
no.of bricks=1500000/2062.5=727 approx