Question

A boy standing near a hill on a hot day claps his hands and hears an echo after 0.8 s. If
the velocity of sound is 340 m/s. how far is he from the hill?​

Answer 1

Explanation:

he is 136m far from the hill.

Answer 2

Answer:

510 m

Explanation:

Let d be the distance of claps from the boy . Therefore total distance covered by sound to go to cliff and come back to boy after reflection from cliff , =2d ,

given v=340m/s,t=3s ,

we have , distance=speed×time ,

2d=v×t=340×3 ,

or d=340×3/2=510m