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31 January, 08:26

The length, breadth and height of a room are 4 m, 3 m and 7 m respectively. Find the coast of white washing the walls of the room and the ceiling at the rate of $6 per m².

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  1. 31 January, 10:53
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    Required area = lb + 2 * h (l + b)

    = 4 * 3 + 2 * 7 (4 + 3)

    = 12 + 14 * 7 = 12 + 98 = 110 m²

    Cost of white-washing at the rate of $6/m²

    = $ 110 * 6 = $ 660
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