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Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 1 > Chapter 17 - Sound Waves > A siren placed at a railway platform is emitting sound of frequency 5kHz. A passenger sitting in a moving train A records a frequency of 5.5kHz while the train approaches the siren. During his return journey in a different train B he records a frequency of 6.0kHz while approaching the same siren. the ratio the velocity of train B to that of train A is

A siren placed at a railway platform is emitting sound of frequency 5kHz. A passenger sitting in a moving train A records a frequency of 5.5kHz while the train approaches the siren. During his return journey in a different train B he records a frequency of 6.0kHz while approaching the same siren. the ratio the velocity of train B to that of train A is

A train moves towards a stationary observer with speed 34m/s. The train sounds a whistle and its frequency registered by the observer is f1. If the train's speed is reduced to 17m/s the frequency registered is f2. If the speed of sound of 340m/s then the ratio f1/f2is