Question

PLEASE GIVE ANSWER OF THIS QUESTION​

Answer 1

Answer:

Echo is the sound reflected from an object.

It needs about 20m to 40m distance to reflecy

Answer 2

Answer:

Echo is the repeated sound that is caused by the reflection of sound waves from a surface.

It occurs due to the time difference between the original sound wave and repeated sound wave reaching to the observer.

Shortest distance = 17.6 m

Hope it gives you your answer.