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in Physics by (87.2k points)
Two trains move towards each other with the same speed. Speed of sound is `340ms^(-1)`. Frequency of tone of the whistle of one when heard by the other changes 9/8 times, then the speed of each trains is
image
A. `10ms^(-1)`
B. `40ms^(-1)`
C. `20ms^(-1)`
D. `15ms^(-1)`

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1 Answer

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by (75.9k points)
Correct Answer - C

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