A floor 7.2 m long and 4.8 m wide is to be covered with square tiles of side 40 cm. How many tiles are needed?
Correct answer C. 216
Explanation
Floor area = 7.2 x 4.8 = 34.56 sq m. Each tile = 0.4 x 0.4 = 0.16 sq m. Number of tiles = 34.56 / 0.16 = 216.
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