A person standing between two vertical cliffs and `680 m` away from the nearst cliff,
Channel: Doubtnut
Date: 2020-07-26

A person standing between two vertical cliffs and `680 m` away from the nearst cliff, shouted. He heard the first echo after `4 s` and the second echo `3 s` later. Calculate (a) the speed of sound in air and (b) distance between the two cliffs.