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Two vehicles, each moving with speed u o...

Two vehicles, each moving with speed `u` on the same horizontal straight road, are spproaching each other. Wind blows along the road with velocity `w`. One of these vehicles blows a whistle of frequency `f_(1)`. An observer in the other vehicle hears the frequency of the whistle to be `f_(2)`. the speed of sond in still air is `VC`. the correct statement `(s)`is (are)

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Two vehicles, each moving with speed u on the same horizontal straight road, are approaching each other. Wind blows along the road with velocity w . One of these vehicles blows a whistle of frequency f_(1) . An observer in the other vehicle hears the frequency of the whistle to be f_(2) . the speed of sound in still air is V_C . The correct statement (s) is (are)

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