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A siren is fitted on a car going towards...

A siren is fitted on a car going towards a vertical wall at a speed of `36 kmh^(-1)`. A person standing on the ground behind the car, listeners to the siren sound coming directly from the source as well as that coming after reflection from the wall. Calculate the apparant frequencies of both the sounds. Velocity of sound `340ms^(-1)`, frequency of the siren 500Hz.

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