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COMEDK Exam 2013 Solved Paper

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Question : 1

Total: 180

The difference between the apparent frequency of a source of sound as perceived by the observer during its approach and recession is 2% of the frequency of the source. If the speed of sound in air is 300ms−1, then the velocity of the source is

15ms−1
12ms−1
6ms−1
3ms−1

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