Question

A boy stands 85m in front of a high wall and then blows a whistle. calculate the time internal when he hear an Echo. ( speed of sound=340m/s)​

Answer 1

If t be the time interval for hearing an echo, the sound travels distance in time t is S=2×85=170m.

Using formula, S=vt, t=S/v=170/340=0.5s

Answer 2

Answer:

answer is 0.5 s

Explanation:

hope it helps u.