Question

find the number of bricks each of 12cm *5cm *7cm required to construct a wall 6m long 2.8m high and 15 cm thick

Answer 1

Area of brick=l×b×h sq.unit
=(12×7×5)sq.cm
=420 sq.cm

Area of a wall=l×b×h sq.unit
=(600×280×150)sq.cm
=2520000sq. cm

No.of bricks required=area of a wall/area of a brick=(2520000/420)bricks
=6000 bricks
hence,6000 bricks required to construct a wall