A wall 9 m long, 6 m high and 20 cm thick, is to be constructed using bricks of dimensions 30 cm, 15 cm and 10 cm. How many bricks will be required.
Length of the wall = 9 m = 9 x 100 cm = 900 cmHeight of the wall = 6 m = 6 x 100 cm = 600 cmBreadth of the wall = 20 cmVolume of the wall = 900 x 600 x 20 cm3 = 10800000 cm^{3}Volume of one Brick = 30 x 15 x 10 cm^{3} = 4500 cm^{3}Number of bricks required to construct the wall = volume of wall/volume of one brick= 10800000/4500= 2400