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    Question

    The volume of a cube is 125 cm³. If the cost of

    painting the cube is Rs. 18 per cm², then find the cost of painting five faces of the cube.
    A Rs. 1,950 Correct Answer Incorrect Answer
    B Rs. 2,250 Correct Answer Incorrect Answer
    C Rs. 2,200 Correct Answer Incorrect Answer
    D Rs. 2,050 Correct Answer Incorrect Answer

    Solution

    Let the length of the edge of the cube be ‘x’ cm.
    Volume of cube = x³
    ATQ;
    125 = x³
    Or, x = 5
    Area of five faces of the cube = 5x² = 5 × 5 × 5 = 125 cm²
    Required cost = 125 × 18 = Rs. 2,250

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