Question

a wall is to be built using bricks of dimension 20cm×16cm×8cm how many bricks to be required if the wall is 10m 5m high 64cm thick?

Answer 1

100×500×64 divided by 20×16×8
=320000 bricks will be needed

Answer 2

Volume of the wall = lbh = 10 X 0.64 X 5 = 32m^3
Volume of 1 brick = lbh = 0.2 X 0.16 X 0.08 = 0.00256m^3
No.of bricks = Volume of the wall / Volume of 1 brick
= 32/0.00256
= 32 X 100000 /0.00256 X 100000
= 3200000 / 256
= 12,5000
No. of bricks required = 12,500 bricks