Posted by **John** on Wednesday, February 22, 2012 at 10:41pm.

Assume you are on a planet with a gravity constant g (instead of 32 feet per second squared) and a speed of sound c (instead of 1100 feet per second), and that you hear the impact of the rock after t seconds. Then the depth of the well is x feet, where your answer depends on g, c, and t.

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