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A police car with a siren of frequency 8...

A police car with a siren of frequency 8 kHz is moving with uniform velocity 36 km/h towards a tall building which reflects the sound waves. The speed of sound in air is 320 m/s. The frequency of the siren heard by the car driver is

A

8.5 kHz

B

8.25 kHz

C

7.25 kHz

D

7.5 kHz

Text Solution

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The correct Answer is:
A
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