A police van moving with velocity 22 m/s and emitting sound of frequency 176 Hz, follows a motorcycle which is moving towards a stationary car and away from the police van. The stationary car is emitting frequency 165 Hz. Speed of sound air is 330 m/s. If motorcyclist does not hear any beats, then his velocity is
Text Solution
Verified by ExpertsThe correct answer is:
B
The motorcyclist observes no beats. So the apparent frequency observed by him from the two sources must be equal.
Solving this equation, we get 
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