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    Question

    The volume of a cube is 3375 cm3. If the cost

    of painting is Rs. 2.5/cm2 , then find the cost of painting the four faces of the cube.
    A Rs. 2888 Correct Answer Incorrect Answer
    B Rs. 2200 Correct Answer Incorrect Answer
    C Rs. 2272 Correct Answer Incorrect Answer
    D Rs. 2250 Correct Answer Incorrect Answer

    Solution

    Let the length of edge of the cube be тАШaтАЩ cm. ATQ; a3 = 3375 Or, a = 15 Area of four faces of the cube = 4 ├Ч 152 = 900 cm2 Required cost of painting = 900 ├Ч 2.5 = Rs. 2250

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