Question

A marble tile measures 12 cm × 10 cm. How many tiles will be required to cover a wall of size 4 m by 3 m? Also, find the total cost of the tiles at Rs 22.50 per tile.

Answer 1

Length of the wall = 4 m = 400 cm
Breadth of the wall = 3 m = 300 cm
Area of the wall = (400×300) cm² = 120000 cm²

Length of the tile = 12 cm
Breadth of the tile = 10 cm
Area of one tile = (12×10) cm² = (120) cm²

$\mathrm{Number}\mathrm{of}\mathrm{tiles}\mathrm{required}\mathrm{to}\mathrm{cover}\mathrm{the}\mathrm{wall}=\frac{\mathrm{Area}\mathrm{of}\mathrm{the}\mathrm{wall}}{\mathrm{Area}\mathrm{of}\mathrm{one}\mathrm{tile}}=\frac{120000}{120}=1000\mathrm{tiles}$
Cost of 1 tile = Rs 22.50
Cost of 1000 tiles = (1000 × 22.50) = Rs 22500

Thus, the total cost of the tiles is Rs 22500.