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 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 September 15, 2020 Category: Cengage NEET by C.P Singh , Chapter 17 - Sound Waves , Part 1 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related