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OpenStudy (karabella98):

A hiker in the middle of a canyon yells “Echo!” and then 4 s later hears his echo off of the walls of the canyon. How far away are the walls of the canyon?

OpenStudy (caominhim):

sound travels at 343 m/s

OpenStudy (karabella98):

So what formula do I use?

OpenStudy (caominhim):

v = x/t it takes 2 seconds to get to the end of the canyon and 2 seconds to get back

OpenStudy (karabella98):

So is 686m right?

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