Question

    The volume of a cube is 1000 cm³. If the cost of

    painting the cube is Rs. 8 per cm², then find the cost of painting five faces of the cube.
    A Rs. 3,200 Correct Answer Incorrect Answer
    B Rs. 3,600 Correct Answer Incorrect Answer
    C Rs. 3,000 Correct Answer Incorrect Answer
    D Rs. 4,000 Correct Answer Incorrect Answer

    Solution

    Let the length of the edge of the cube be ‘x’ cm.
    Volume of cube = x³
    ATQ; 1000 = x³
    Or, x = 10
    Area of five faces of the cube = 5x² = 5 × 10 × 10 = 500 cm²
    Required cost = 500 × 8 = Rs. 4,000

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