A siren placed at a railway platform is emmitting sound of frequency `5 kHz`. 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 `6.0 kHz` while approaching the same siren. the ratio the velocity of train of `A` is

A siren placed at a railway platform is emitting sound of frequency 5 kHz . 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 6.0 kHz 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 5 kHz . 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 6.0 kHz 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 a sound of frequency 5 kHz. A passenger sitting in a moving train ‘A’ records the frequency of the siren as 5.5 kHz. During his return journey by train ‘B’ he records the frequency of the siren as 6 kHz. The ratio of the speed of train B to that of train A is