Question

The number of bricks of size 20 cm by 10 cm needed to floor a room of size 20 m by 16m is
a.200
b.2000
c.20000
d.20

Answer 1

no. of bricks = area of floor / are of bricks
= 2000x1600/20x10
= 16000

Answer 2

no. of bricks = area of floor/ area of bricks
= 16000 bricks