Question

A tile measures 10cm into 10cm how many such tiles are required to cover a wall of 4m and 2m

Answer 1

4 m = 400 cm
2m = 200 cm
___________________

Area of rectangle  = length × breadth

Area of wall = 400 ×200

Area of wall = 80000

______________

Area of tile  = 10 ×10 

Area of tile = 100 cm²
_________________________

Tiles required = $\frac{80000}{100}$

Tiles required = 800 


i hope this will help you


-by ABHAY