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The least number of square tiles required to pave the ceiling of a room 15 m 17 cm long and 9 m 2 cm broad is (a) 656 (b) 738 (c) 814 (d) 902

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The least number of square tiles required to pave the ceiling of a room 15 m 17 cm long and 9 m 2 cm broad is (a) 656 (b) 738 (c) 814 (d) 902
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Correct Answer - 814
Side of each square tile = HCF ( 1517 cm, 902 cm) = 41 cm.
Required number of tiles = `((1517 xx 902)/(41 xx 41)) = 814`
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