Physics

A rock is dropped into a deep hole and 2.2 s later the sound of striking the bottom is heard. If the speed of sound is 340 m/s, what is the depth of the hole?

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asked by Suzy
  1. see related questions below, and change the numbers as necessary. The key is to separate the 2.2 seconds into the falling time and the return time.

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    posted by Steve
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