Asked by Abhay

A stone is dropped into a well of 80m deep. The sound of splash is heard 4.20 sec after the stone is dropped. Find the velocity of sound in air.
Answered by Steve
time to fall is from

80 = 4.9t^2
t = 4.04 s

time for sound to return: 4.20-4.04 = 0.16 s

80m/0.16s = 500m/s
Answered by Preethi
The answer is not 500 it is 400
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