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A siren placed at a railway platfere is ...

A siren placed at a railway platfere 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

A

`(242)/(252)`

B

2

C

`5//6`

D

`11//6`

Text Solution

Verified by Experts

The correct Answer is:
B
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