Two trains move towards each other with the same speed. Speed of sound is 340 ms^(-1). Frequency of tone of the whistle of one when heard by the other changes 9/8 times, then the speed of each trains is then the speed of each trains is Two trains move towards each other with the same speed. Speed of sound is 340 ms^(-1). Frequency of tone of the whistle of one when heard by the other changes 9/8 times June 26, 2021 Category: Arihant Physics by D.C Pandey , Chapter 17 - Wave Motion , Volume 2 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related