Two trains A and B approach a station from opposite sides, sounding their whistles. A stationary observer on the platform hears no beats. If the velocities of A and B are 15 m/s and 30 m/s respectively and the real frequency of the whistle of B is 600 Hz, the real frequency of the whistle of A is (Velocity of sound = 330 m/s).

600 Hz

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630 Hz

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570 Hz

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660 Hz

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Solution

The correct option is B
630 Hz

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The correct option is B 630 Hz

The correct option is B
630 Hz