A train is moving on a straight track wi...

A train is moving on a straight track with speed `20 ms^(-1).` It is blowing whistle at the frequency of 1000 Hz. The percentage change in the frequency heard by a person standing near the track as the train passes him is close to (speed of sound = 320 `ms^(-1)).`

0.18

0.24

0.06

0.12

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ALLEN -WAVES AND OSCILLATIONS-Part-1(Exercise-05)[A]

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