Question

PERIMETER AND AREA
A marble tile measures 20 cm by 15 cm.
How many tiles will be required to cover a wall of size 5 m by 3m ?

Answer 1

Dimensions of marble in meters = 0.2 × 0.15

Area of the wall = 5 × 3 = 15 m²

Area of single tile = 0.03 m²

Number of tiles = 15/0.03 = 500

-WonderGirl

Answer 2

Area of tile = 0.2 x 0.15 = 0.03 m^2
Area of wall = 5 x 3 = 15 m^2
No. of tiles = 15/0.03 = 500
Perimeter of wall = 2(5+3)
= 16m
Perimeter of Tile = 2(0.2 + 0.15)
= 0.7m