Multiple Choice Questions on A rectangular block of metal has dimensions 21 cm 77 cm 24 cm The block has been melted into a spher........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A rectangular block of metal has dimensions 21 cm 77 cm 24 cm The block has been melted into a spher...........

Quantitative Aptitude ( CCS) Mensuration 3D
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    A rectangular block of metal has dimensions 21 cm*77 cm*24 cm. The block has been melted into a sphere. The radius of the sphere is

    28cm
    Incorrect Answer
    21cm
    Correct Answer
    32cm
    Incorrect Answer

    18cm

    Incorrect Answer
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    Explanation:

    Volume of the sphere=4/3*22/7*r3
    4/3*22/7*r3=21*77*24
    r3=(21*77*24*3*7)/(4*22)
    =33 * 73
    r=3*7=21cm

    By: Amit Kumar
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