A boy dropped a stone in a well 45m deep if the speed of sound is 340m per second then after how much time he willl hear the splash take the g equals 10m per second?

Answer 1

If you mean 'after the splash is seen' then g has nothing to do with this problem; only the speed of sound and the distance.

500/340 =1.47 seconds.

If you want to include the time it takes for the stone to fall then

500 = 1/2x10 t2 t= 10 seconds 10+1.47 = 11.47 seconds

Answer 2

Velocity= (distance*2)/time 340=(45*2)/t; 340/90=t; t=3.78 seconds