Question

A marble tile measure 25cm by 20cm.How many tiles will be required to cover a wall of size 4m by 3m?

Answer 1

area of wall = 4*3= 12m2= 120000 cm2
area of tile = 25*20= 500 cm2
no of tiles= 120000/500= 240

Answer 2

area of tile = 25 X 20 = 500cm^2
area of wall = 400 X 300 = 120000cm^2
No. of tiles required to cover the wall is=
= area of wall / area of tile
= 120000 / 500 = 240
Hence 240 tiles are required to cover the wall.