Question

a man standing between two parallel mountains hears the first echo after 2 seconds and the second echo after 4 seconds of firing a bullet from a gun .if the velocity of sound in air is 332/s what is the distance between the two mountains​

Answer 1

Answer:

The first echo is heard after 2 seconds. Hence sound travels upto one cliff and echo is heard after 2 seconds. So, sound takes one second to travel to the cliff. Now this sound travels upto the second cliff and echo is heard after 2 seconds,from first echo.