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

  • question_answer
    Find the value of \[\sqrt[3]{343}\times \sqrt[3]{-64}\].

    A)  \[28\]                                  

    B)                         \[-28\]                

    C)                         \[18\]                                                  

    D)                         \[-18\]                

    Correct Answer: B

    Solution :

     \[\sqrt[3]{343}\times \sqrt[3]{-64}=\sqrt[3]{343\times -64}\] \[=-\sqrt[3]{7\times 7\times 7\times 4\times 4\times 4}\]                                 \[=-7\times 4=-28\]


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