Cyclinder ratio question

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So we know that the surface area of two cyclinders are in a ratio of 9:49. Then how do we find the ratio of their height and volume?

I have absolutely no clue on where to begin here because I don't know what the radius is.

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For any similar solids, if the similarity ratio is $k$, the ratio of their surfaces is $k^2$ and the ratio of their volumes is $k^3$.