Two trains, each moving with a velocity of 30m/s, cross each other. O – McqOptions

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1.	Two trains, each moving with a velocity of 30m/s, cross each other. One of the trains gives a whistle whose frequency is 600Hz. If the speed of sound is 330m/s, the apparent frequency for passengers sitting in the other train before crossing would be __________
A.	600Hz
B.	630Hz
C.	930Hz
D.	720Hz
Answer» E.

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