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    Question

    The volume of a solid cube is 1331 m3. If

    whole cube is to be painted at a rate of Rs. 10 per m2, then what will be the cost of painting the cube?
    A Rs. 7060 Correct Answer Incorrect Answer
    B Rs. 7230 Correct Answer Incorrect Answer
    C Rs. 7260 Correct Answer Incorrect Answer
    D Rs. 7270 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the edge length of the cube = ‘a’ metres Then, volume of the cube = a3 = 1331 So, a = 1331(1/3) = 11 So, total surface area of the cube = 6a2 = 6 × 112 = 726 m2 So, cost of painting the cube = 726 × 10 = Rs. 7260

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