Question

an echo was heared after 3s.what is the distance of the reflecting from the sorce (speed of sound =34m/s)

Answer 1

since ,

time of echo = 3 seconds

speed of sound = 34 m/s

so,

distance = $\frac{speed \times time}{2}$

= $\frac{34 \times 3}{2}$

= $\frac{102}{2}$

= 51 metre

Answer 2

Here is your answer :)