9. a) A tile is a square of side 20cm . How many such tiles would be required to cover the floor of a square bathroom of side 3m

Answer:225 tiles
Step-by-step explanation:
area of floor=number of tile * area of each tile
side*side= x *(side*side)
300*300=x * (20*20)
300/20*300/20=x
15*15=x
225=x