The surface area of one dodecahedron is 9. A similar dodecahedron has a surface area of 16. What is the ratio of the volume of the first dodecahedron to the second?
I need a quick way to solve this, like for a math competition
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https://www.tes.com/teaching-resource/ratio-of-length-area-and-volume-of-similar-shapes-6336751 – GNUSupporter 8964民主女神 地下教會 Sep 29 '18 at 20:27
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You do not need such a formula. Instead, analyze the scaling; surface area grows with the square and volume with the cube.
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