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NEET 2016 Physics and Chemistry Paper 1

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Question : 12

Total: 90

A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of 15ms−1. Then, the frequency of sound that the observer hears in the echo reflected from the cliff is : (Take velocity of sound in air =330ms−1)

885 Hz
765 Hz
800 Hz
838 Hz

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