📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!

    Question

    The volume of a cube is 729 cm 3 . If the cost

    of painting the cube is Rs. 10 per cm 2 , then find the cost of painting five faces of the cube.
    A Rs. 4,860 Correct Answer Incorrect Answer
    B Rs. 4,250 Correct Answer Incorrect Answer
    C Rs. 4,150 Correct Answer Incorrect Answer
    D Rs. 4,400 Correct Answer Incorrect Answer
    E Rs. 4,050 Correct Answer Incorrect Answer

    Solution

    Let the length of the edge of the cube be ‘x’ cm.
    Volume of cube = x 3
    ATQ;
    729 = x 3
    Or, x = 9
    Area of five faces of the cube = 5x 2  = 5 × 9 × 9 = 405 cm 2
    Required cost = 405 × 10 = Rs. 4,050

    Practice Next
    More Mensuration Questions

    Relevant for Exams:

    ask-question