Question

A floor 5 m by 20 m is covered by square tiles of
side 20 cm. How many tiles are needed?

Answer 1

Answer:

Area of floor = 2000 × 500 cm^2 = 1000000 cm^2

Area of tiles = 20×20 = 400 cm^2

No. of tiles = 1000000/400 = 2500 tiles

Answer 2

Answer:

5m= 500cm and 20m= 2000cm

area of floor = l×b

=500×2000

=1000000cm^2

side of tile=20cm

area of tile=20×20=400cm^2

No. of tiles=1000000/400

=2500