Question

A boy fires a gun and hears the echo 2 seconds later. If he is 350m away from a wall, calculate the velocity of sound in air.

Answer 1

Answer:

Given,

Distance = 350m

Time = 2sec

To find:-

Speed

We know that Speed = distance / time taken

= 350 / 2

= 175m/s

The Velocity of sound in air is 175m/s.

Answer 2

Answer:

distance=350×2m=700m(because the sound travels a distance of 350m and hit the wall then return and travel a distance of 350m)

than distance=700

time taken=2s

We know that

v=d/t

v=700m/2s

v=350m/s