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How many inches in height will be the scaled-up Pyramid?

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My friend has a miniature Pyramid of Egypt. It is 4 inches in height. Friend was invited to display it at an exhibition. Friend felt it was too small and decided to build a scaled-up model of the Pyramid out of material whose density is (1 / 5) times the density of the material used for the miniature. He did a "back-of-the-envelope" calculation to check whether the model would be big enough.

If the mass (or weight) of the miniature and the scaled-up model are to be the same, how many inches in height will be the scaled-up Pyramid?

posted Jul 3, 2014 by Pankaj Deshmukh

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