Question

A man stands at a distance of $250m$ from a wall. He shoots a rifle and hears the echo after $1.5$ seconds. Calculate the velocity of sound.

• A. $333m/s$
  
• B. $383m/s$
  
• C. $433m/s$
  
• D. $483m/s$
  

Answer 1

Answer: (A)

$333m/s$

Total distance covered by the sound wave to come back to the rifleman ,

$d=50+50=500m$ ,

total time taken by the sound wave to come back to rifleman after reflection from the wall, to produce an echo ,

$t=1.5s$ ,

therefore , velocity of sound ,

$v=d/t=500/1.5=333.33m/s$