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  1. If the sides of two cubes are in the ratio 3: 1 the ratio of their total surface area is?
    2. A.
    3:1
    B.
    8:1
    C.
    9:1
    D.
    12:1

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    Answer : Option C

    Explanation :

    a1 : a2 = 3 : 1

    6 a12 : 6 a22 = 9: 1

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