Find the number of bricks, each measuring 24 cm x 12 cm x 8 cm, required to construct a wall 24 m long, 8m high and 60 cm thick, if 10% of the wall is filled with mortar?

Correct Answer : C.

Volume of the wall = (2400 x 800 x 60) cu. cm
Volume of bricks = 90% of the volume of the wall

                         =((90/100)*2400 *800 * 60)cu.cm.

        Volume of 1 brick = (24 x 12 x 8) cu. cm.

 Number of bricks=(90/100)*(2400*800*60)/(24*12*8)=45000.