11 Two trains move towards each other with the same speed

Last updated: 6/9/2023

11 Two trains move towards each other with the same speed Speed of sound is 340 ms 1 If the frequency of the tone of the whistle of one when heard by the other changes by 9 8 times then the speed of each train is a 10 ms 1 c 20 ms 1 V 1 b 40 ms d 15 ms 1