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    Question

    The weight of a sphere is jointly proportional to the

    cube of its radius and the density of the material of which it is made. The radii of two spheres are 17 : 8 and the densities of materials 3 : 4. If the weight of the second sphere be 40 kg, then the approximate weight of the first sphere is: 
    A 287.87 kg Correct Answer Incorrect Answer
    B 96 kg Correct Answer Incorrect Answer
    C 230 kg Correct Answer Incorrect Answer
    D 123.26 kg Correct Answer Incorrect Answer

    Solution

    The correct answer is A

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