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No. of tiles =Area of floor / Area of tiles.

area of floor = 300 X 50 sq cm.

area of tiles = 20 X10 sq cm.hence, no. of tiles = 300 X50 /200 =75

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Q: How many tiles of size 20 cm x 10 cm will be needed to cover a floor of dimensions 300cm X 50 cm?
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