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Two trains A and B are approaching a pla...

Two trains A and B are approaching a platfrom from opposite directions .The siren in the station is making a sound at a frequency 4kHz.The passengers in trains A and B hear siren at frequencies 4.5 and 5kHz respectively.Then the velocities of the trains A and B are (velocity of sound in air =340 m/s)

A

42.5 m/s ,85m/s

B

75 m/s, 55 m/s

C

85 m/s, 8.5 m/s

D

42.5 m/s ,62.m/s

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TARGET PUBLICATION-WAVE MOTION -MCQ 7.1
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