Lisa B.

asked • 04/21/13# A right rectangular prism has a total surface are of 512. If all of the edges are congruent, find the length of one of them

Help! I don't know how to start!

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## 1 Expert Answer

Robert J. answered • 04/21/13

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Certified High School AP Calculus and Physics Teacher

Since all the edges are congruent, this prism must be a cube.

There are 6 faces in a cube, each of which has an area of 512/6, and thus an edge of sqrt(512/6).

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Robert J.

9.2376 is better. The length of an edge can be a decimal.

04/21/13