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15 February, 00:40

A person yells at a canyon wall 200 m away. How long after they yell will they hear their echo

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  1. 15 February, 03:08
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    Assuming the air in the canyon is at 25 °C, the speed of sound is 346 m/s.

    Total distance to be covered = 200 + 200 = 400 m

    Time = distance / speed

    Time = 400 / 346

    Time = 1.16 seconds
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