Waves - Result Question 80
82. Two trains move towards each other with the same speed. The speed of sound is . If the height of the tone of the whistle of one of them heard on the other changes times, then the speed of each train should be
(a)
(b)
(c)
(d)
[1991]
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Answer:
Correct Answer: 82. (a)
Solution:
- (a) Here,
Source and observer are moving in opposite direction, therefore, apparent frequency