A man stands between two parallel cliffs (not in middle). When he claps his hands, he hears two
Channel: Doubtnut
Date: 2020-08-30

A man stands between two parallel cliffs (not in middle). When he claps his hands, he hears two echoes one after `1` second and the other after `2` second. If the velocity of sound in air is `330 ms^(-1)` , the width of the valley is