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same ng in open pe is d per de is asing ives 3 e last...

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same ng in open pe is d per de is asing ives 3 e last Hz duces may be a 420 Hz c 440 Hz b 430 Hz d 450 Hz 94 A train standing in a station yard blows a whistle c frequency 400 Hz in still air The wind starts blowing in the direction from the yard to the station with speed of 10 ms Which of the following statemen is correct Speed of sound in still air is 340 ms a The frequency of sound as heard by an obserw standing on the platform is 400 Hz b The speed of sound for the observer standing the platform is 330 m s c The frequency of sound as heard by the obser standing on the platform will increase d The frequency of sound as heard by the obser unding on the platform will decrease

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