Question: A stationary source is emitting sound at a fixed frequency fo, which is reflected by two cars approaching the source. The difference between the

A stationary source is emitting sound at a fixed frequency fo, which

A stationary source is emitting sound at a fixed frequency fo, which is reflected by two cars approaching the source. The difference between the frequencies of sound reflected from the cars is 1.2% of fo. What is the difference in the speeds of the cars (in km per hour) to the nearest integer ? The cars are moving at constant speeds much smaller than the speed of sound which is 330 ms .

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