the Splash is heard after 4.22 seconds after the stone is dropped into a well of depth 78.4 metre the velocity of sound is how much (write the answer with steps)
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Let the velocity of sound be v. Time taken by stone to reach bottom of well be t.
From the given,information,we know that:
-78.4=0t-1/2*9.8*t2
t=4 s
Time taken by sound to reach the ears,
t'=4.22-4=0.22 s
Hence,
Velocity of sound =78.4/0.2556.36.2=356.36 ms-1
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