Question

a floor 10 m long and 7 m long is to be paved with square tiles of side 50 cm.Find the number of tiles required

Answer 1

area of floor=10*7=70metre square
area of a tile =1/2*1/2=1/4metre square
number of tiles=70/0.25=70*4=280

Answer 2

please refer to the attachment


Hope it will help you