A wall 15 m long, 30 cm wide and 4 m high is made of bricks, each measuring Ifof the total volume of the wall consists of mortar, how many bricks are there in the wall?

Given,


Dimensions of wall = 15m × 30cm × 4m = 1500 cm × 30 cm × 400 cm


Dimensions of each brick = 22 cm × 12.5 cm × 7.5 cm


Volume of wall = l × b × h = 1500 × 30 × 400 = 180000000 cm3


Area of mortar = 1/12 × volume of wall =


Hence,


Area occupied by bricks only = 180000000 – 15000000 = 165000000 cm3


Number of bricks required =


6