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    Question

    A rod of length of 616 cm and 35cm radius is melted and

    converted into a sphere of radius 21cm, find how many such proper spheres can be made?
    A 55 Correct Answer Incorrect Answer
    B 68 Correct Answer Incorrect Answer
    C 61 Correct Answer Incorrect Answer
    D 51 Correct Answer Incorrect Answer

    Solution

    Volume of rod = πr²h
    Volume of sphere = πr³
    π × 35 × 35 × 616 = n × 4/3 × π × 21 × 21 × 21
    n = 61.11
    No. of spheres = 61

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