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    Question

    The volume of a cube is 1331 cm³. If the cost of painting

    the cube is Rs. 7 per cm², then find the cost of painting five faces of the cube.
    A Rs. 3,432 Correct Answer Incorrect Answer
    B Rs. 3,250 Correct Answer Incorrect Answer
    C Rs. 3,400 Correct Answer Incorrect Answer
    D Rs. 3,185 Correct Answer Incorrect Answer
    E Rs. 4,235 Correct Answer Incorrect Answer

    Solution

    Let the length of the edge of the cube be ‘x’ cm.
    Volume of cube = x³
    ATQ;
    1331 = x³
    Or, x = 11
    Area of five faces of the cube = 5x² = 5 × 11 × 11 = 605 cm²
    Required cost = 605 × 7 = Rs. 4,235

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