8th Class Mathematics Mensuration Question Bank Mensuration

  • question_answer Find the number of lead balls of radius 1 cm each that can be made from a sphere of radius 4 cm.

    A)  24                               

    B)  85             

    C)  64     

    D)  46

    Correct Answer: C

    Solution :

    (c): no. of lead balls \[\frac{V}{v}=\frac{\frac{4}{3}\pi {{R}^{3}}}{\frac{4}{3}\pi {{r}^{3}}}\] \[={{\left( \frac{R}{r} \right)}^{2}}={{\left( \frac{4}{1} \right)}^{3}}=64\]

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