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MHT CET Physics question

PhysicsWavesMHT CET

Two train A & B approach a stationary observer from opposite sides with speeds and respectively, observer hears no beats. If frequency of whistle of train B is 540 Hz, the frequency of whistle of A is: ()

Answer: (C)

Solution

No beats means the two apparent frequencies are equal: , so $ =

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Question ID VK-070018