7th Class Mathematics Mensuration Question Bank Mensuration

  • question_answer
    The surface area of a cube is 216 sq. cm. Its volume is:

    A)  \[912\,c{{m}^{2}}\]                       

    B)  \[216\,c{{m}^{3}}\]

    C)  \[512\,c{{m}^{3}}\]                       

    D)  \[926\,c{{m}^{2}}\]

    Correct Answer: B

    Solution :

        Let each side of cube be 'a' \[\therefore \]  Surface area of cube\[=6{{a}^{2}}\] \[6{{a}^{2}}=216\] \[\Rightarrow {{a}^{2}}=36\] \[\Rightarrow a=6\,cm\] Volume of cube\[={{a}^{3}}c{{m}^{3}}={{(6)}^{3}}=216\,c{{m}^{3}}\]


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