Question

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)

Answer 1

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