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

  • question_answer
    A metallic cuboid with dimensions \[16\text{ }cm\times 8\text{ }cm\times 4\text{ }cm\] was melted and recast into a cube. What is the length of the edge of the cube?

    A)  \[8\,cm\]                           

    B)                         \[2\,cm\]                           

    C)                         \[4\,cm\]                           

    D)                         \[16\,cm\]                         

    Correct Answer: A

    Solution :

    Volume of the metallic cuboid \[=16\times 8\times 4\,c{{m}^{3}}=512\,c{{m}^{3}}\] \[\therefore \] The edge of the cube\[=\sqrt[3]{512}\] \[=8\,cm\].


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