# SOLUTION: a square floor needs 400 square tiles each 10cm long. What is the area of the floor in square metres?

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 Question 445513: a square floor needs 400 square tiles each 10cm long. What is the area of the floor in square metres? Answer by rwm(914)   (Show Source): You can put this solution on YOUR website!400*10^2=cm^2 400*100=40000 cm^2 convert to square metres 200*200 it is 200 cm wide by 200 cm long which is 2 metres by 2 metres=4 sq metres another way 100*100 cm^2=1 square metre 40000/10000=4 square metres