Question

    The volume of a cube is 216 cm³. If the cost of

    painting the cube is Rs. 12 per cm², then find the cost of painting five faces of the cube.
    A Rs. 2,160 Correct Answer Incorrect Answer
    B Rs. 1,296 Correct Answer Incorrect Answer
    C Rs. 1,500 Correct Answer Incorrect Answer
    D Rs. 1,180 Correct Answer Incorrect Answer

    Solution

    Let the length of the edge of the cube be ‘x’ cm.
    Volume of cube = x³
    ATQ;
    216 = x³
    Or, x = 6
    Area of five faces of the cube = 5x² = 5 × 6 × 6 = 180 cm²
    Required cost = 180 × 12 = Rs. 2,160

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