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Volume and Surface Area of Solid Figures

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  1. Two cubes have volumes in the ratio 1: 27, The ratio of their surface areas is ?
    1. 1 : 3
    2. 1 : 8
    3. 1 : 9
    4. 1 : 18
Correct Option: C

Let the volume be x3 and 27x3
∴ Their edges are x and 3x

Now Ratio of their surface area = 6x2 : 54x2 = 1 : 9


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