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A source and a listener are approaching ...

A source and a listener are approaching closer with a relative velocity of `40 ms^(-1)`.If the true source frequency is 1200 Hz, calculate the observed frequency under these conditions : (i)The source along is moving (ii)The listener along is moving Take speed of sound in air `340 ms^(-1)`.

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The correct Answer is:
1360 Hz, 1341 Hz
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