Numerical A stationary source is emitting sound at a fixed frequency fo which is reflected by two cars approaching the source

Question

Numerical A stationary source is emitting sound at a fixed frequency fo which is reflected by two cars approaching the source The difference between t requencies of sound reflected from the cars is 1 2 of fo What is the difference in the speeds of the cars ho The cars are moving at constant speeds much smaller than the speed of sound which is 330 ms at km per hour to the nearest inte m

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