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    The ratio of the volumes of two cubes is 64 : 1331. What is the ratio of their total surface areas?
    Question

    The ratio of the volumes of two cubes is 64 : 1331. What is the ratio of their total surface areas?

    A.

    16 : 121

    B.

    121 : 16

    C.

    16 : 4

    D.

    4 : 121

    Correct option is A

    Given:
    Volume ratio = 64 : 1331

    Formula Used: 

    Volume of cube = side3\text{side}^3  

    Surface area ratio =(side ratio)2(\text{side ratio})^2​ , where side ratio =volume ratio3\sqrt[3]{\text{volume ratio}}​ ​ 

    Solution:
    Side ratio of two cubes =6413313=411\sqrt[3]{\frac{64}{1331}} = \frac{4}{11}​​

    Surface area ratio of two cubes = (411)2=16121\left(\frac{4}{11}\right)^2 = \frac{16}{121}​​

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