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8th Class Mathematics Cubes and Cube Roots Question Bank Cubes and Cube Roots

  • question_answer
    If \[72K\] is a perfect cube, find the value of K.

    A)  \[1\]                                    

    B)                         \[2\]                    

    C)                         \[3\]                                    

    D)                         \[4\]                    

    Correct Answer: C

    Solution :

    \[72=2\times 2\times \times 2\times 3\times 3\] If  \[K=3,\] \[72\,K=72\times 3=216={{6}^{3}}\] is a perfect cube.


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