Question

A room is 4m 20cm long and 3m 50cm wide. How Many square tiles of side 70cm is needed to cover the floor of the floor

Answer 1

Step-by-step explanation:

first change the room's len. and bre.

4m 20cm = 420cm

3m 50cm = 350cm

i)now find the area of room

350x420 = 147000

ii) area of sq. tiles

70x70=4900

a/q

divide the area of (i) to (ii)

14700

4900

=30

so, 30 tiles is needed