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A car sounding its horn at 480 Hz moves ...

A car sounding its horn at 480 Hz moves towards a high wall at a speed of `20 ms^-1`. If the speed of sound is `340 ms^-1`, the frequency of the reflected sound heard by the passenger sitting in the car will be nearest to

A

480 Hz

B

510 Hz

C

540 Hz

D

5570 Hz

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