Question

A boy hears an echo of his own voice from a distant hill after s .The speed of sound is 340 m /s . What is the distance of the hill from the boy.

Answer 1

Given :

Speed of sound= 340 m/s

Here time is not given

I am assuming as t=1 sec

distance=d?

as it is echo:

Formula

speed= 2x distance/ time

distance= speed x time/2

=340x1/2

d= 170 m

If the time is other value, above  procedure can be followed