Question

If the splash is heard 4.23 seconds after a stone is dropped into a well. 78.4 metes deep, find the velocity of sound in air?

Answer 1

Here, depth of well = * = 78.4m

Total time after which splash is heard = 4.23s

If t1 = time taken by store to hit the water surface is the well

t2 = time taken be splash of sound to reach the top of well.

then t1 + t2 = 4.23 sec.

Now, for downward journey of stone;