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

  • question_answer
    If \[\sqrt[3]{-2744}\div \sqrt[3]{0.008}=x\],then the value of x is __.

    A)  70                  

    B)         -70     

    C)  14                  

    D)         -14                 

    Correct Answer: B

    Solution :

    We have, \[x=\sqrt[3]{-2744}\div \sqrt[3]{0.008}\] \[=\sqrt[3]{(-14)\times (-14)\times (-14)}\div \sqrt[3]{0.2\times 0.2\times 0.2}\] \[=-14\div 0.2=\frac{-14}{2}\times 10=-70\]


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