Question

A stone is dropped into a well in which the level of water is below the top of the well. If v is the velocity of the sound then the time T after dropping the stone is.?

Answer 1

Because T2 is the time taken by the sound wave to reach the top of the well from the water level
here h=distance travelled by the sound wave
that is the depth of the well
v is the velocity of sound wave
we know that
time taken=distance travelled/velocity
so here
T2=h/v
h is the depth of well
distance between top of well and water level
v is the velocity of sound wave with which it is travelling in the well