Hiking in the mountains the temperature is 20oc you shout, Ask an Expert

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Hiking in the mountains, (the temperature is 20^oC) you shout "hey", wait 1.55 s and shout again.

a) What is the distance between the sound waves you cause?

b) If you hear the first echo after 5.81 s, what is the distance between you and the point where your voice hit a mountain?

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