A train is moving with a constant speed along a circular track The engine of the train emits a sound of frequency f The

Question

A train is moving with a constant speed along a circular track The engine of the train emits a sound of frequency f The frequency heard by the guard at rear end of the train A is less than f B is greater than f C is equal to f D may be greater than less than or equal to fdepending on the factors like speed of train length of train and radius of circular track

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