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A person P is standing at perpendicular ...

A person P is standing at perpendicular distance of 100 m from point Q on a highway.A bus B is moving with a speed of 30√2 m/s toward point Q on the highway.The driver of the bus blows a horn of frequency 1200 Hz . The frequency of the sound received by the person P, when the bus emits sound when it is at distant 100 m from Q is [ speed of sound in air is 330 m/s]

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