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Question

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Q. Find the cost of flooring a room 7.5 meter by 6 m with square tile of side 30 cm at the rate of Rs 6 per tile.

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Solution

Length of floor = l = 7.5 m = 750 cmBreadth of floor = b = 6 m = 600 cmArea of floor = l × b = 750 × 600 = 450000 cm2Length of each side of square tile = s= 30 cmArea of square tile = s×s = 30 × 30 = 900 cm2Number of tiles = area of floorarea of 1 tile = 450000900 = 500Cost of 1 tile = Rs 6Cost of 500 tiles = Rs 6 × 500 = Rs 3000

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