Square tiles of side 20cm are to be laid on the floor of a room 10m by 4.5m. How many tiles will be needed .Find the cost of putting the tiles at rs131.40 per tile.
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tiles needed=area of floor/area of one tile
tiles needed=4500÷20=225
cost=225(131.40)
tiles needed=4500÷20=225
cost=225(131.40)
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