A person observes two moving trains, A reaching the station and B leaving the station with equal speed of . If both trains emit sounds with frequency , the approximate difference of frequencies heard by the person will be:
- A
- B
- C
- D
A person observes two moving trains, A reaching the station and B leaving the station with equal speed of . If both trains emit sounds with frequency , the approximate difference of frequencies heard by the person will be:
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