\"\"

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Find ratios between the corresponding parts of the pyramids.

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Find ratios of heights:

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\"\"

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\"\"                    (Substitute \"\")

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\"\"                      (Simplify)

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The scale factor is 4 : 3.\"\"

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If the scale factor is a : b, then the ratio of the volumes is \"\": \"\".

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Find ratios of Volumes:

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\"\"

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\"\"

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\"\"                 (Substitute \"\")

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\"\"                    (Evaluate powers)\"\"

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The ratio of the surface areas is 64 : 27.