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Two engines pass each other moving in op...

Two engines pass each other moving in opposite directions with uniform speed of of them is blowing a whistle of frequency 540 Hz. Calculate the frequency heard by driver of second engine before they pass each other. Speed of sound is 300 m/sec :

A

648 Hz

B

450 Hz

C

270 Hz

D

540 Hz

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The correct Answer is:
A
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ALLEN-WAVES AND OSCILLATIONS-Part-1(Exercise-05)[A]
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