Question

Rehman wanted to cover the wall of his bedroom with square tiles of his bedroom with

square tiles of size 12 cm. The wall is 240cm long and 120cm wide. Find the number of tiles.​

Answer 1

Area of a square = Side × Side

Area of a rectangle = Length × Width

Given, side of the square tile is 12 cm and the dimensions of the rectangular wall 240 cm and 120 cm respectively.

Area of the square = ( 12 × 12 ) sq.cm

ﾠﾠㅤﾠﾠﾠㅤﾠﾠﾠﾠﾠﾠﾠﾠ= 144 sq.cm

Area of the 4 rectangular walls = 4 ( Length × Width ) = 4 ( 240 × 120 ) sq.cm = 4(28800) sq.cm = 115200 sq.cm

The no. of tiles = Area of the 4 rectangular walls / Area of the square tile = 115200 / 144 = 800

800800 square tiles were used to cover the walls of Rehman's bedroom.