Question

Why can you not hear the echo if you stand 10 m away from a wall and shout towards it ?

Answer 1

We cannot hear the echo if we stand 10 m away and shout because the principle of echo is it can be heard if the distance is 17m

Answer 2

Answer:

17m

Explanation:

speed of sound=340m

hear an echo=0.05

s=v*t

s=340*0.05

s=17m