Question

A marble tile measures 10 cm × 12 cm. How many tiles will be required to cover a wall of size
3 m × 4 m? Also, find the total cost of the tiles at the rate of Rs 2 per tile.

Answer 1

Dimension of the tile = 10 cm × 12 cm
Dimension of the wall =3 m × 4 m = 300 cm × 400 cm (Since, 1 m = 100 cm, so, 3 m = 300 cm and 4 m = 400 cm)
Area of the tile = 10 cm × 12 cm = 120 cm²
Area of the wall = 300 cm × 400 cm =1,20,000 cm²
Number of tiles required to cover the wall = $\frac{Areaofwall}{Areaofonetile}$ = $\frac{120000}{120}$ = 1,000 tiles
Cost of tiles at the rate of Rs. 2 per tile = 2 × 1,000 = Rs. 2,000