Question

Hans stands at the rim of the grand canyon and yodels down to the bottom. He hears his yodel echo back from the canyon floor 5.20 seconds later. Assume that the speed of sound in air is 340.0m per second. How deep is the canyon? Hint: Note that the time is for the sound to travel to the bottom and back
Since the sound has to travel in both directions:

340 * 5.2/2 = ?

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