Wave Motion 4 Question 24
23. An observer standing on a railway crossing receives frequency of and when the train approaches and recedes from the observer. Find the velocity of the train. (The speed of the sound in air is .)
(2005, 2M)
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Answer:
Correct Answer: 23.
Solution:
- From the relation,
, we have
Here,
Solving Eqs. (i) and (ii), we get