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9th Class Mathematics Surface Areas and Volumes Question Bank Surface Areas and Volumes

  • question_answer
    The edge of a cube is 20 cm. How many small cubes of edge 5 cm can be formed from this cube?

    A)  4                                

    B)  32                   

    C)  64                   

    D)         100                 

    Correct Answer: C

    Solution :

    Let ?n? be the number of cubes which can be formed from the given cube. Volume of big cube = Volume of n smaller abes \[\Rightarrow \]\[20\times 20\times 20=n\times 5\times 5\times 5\] \[\Rightarrow \]\[n=\frac{20\times 20\times 20}{5\times 5\times 5}=4\times 4\times 4=64\]


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