A police car horn emits a sound at a frequency 240 Hz. When the car is at rest. If the speed of the sound is 330 m/s the frequency heard by an observer who is approching the car at a speed of 11 m/s is
A
248 Hz
B
244Hz
C
240 Hz
D
230 Hz
Text Solution
Verified by Experts
The correct Answer is:
A
`f'=((V+V_(0))/V)f` `f=248 Hz`
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