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MHT CET Physics question

PhysicsWavesMHT CET

A source of sound is travelling with a velocity 40 km/hr towards stationary observer and emits sound of frequency 2000 Hz. If velocity of sound is 1220 km/hr, then what is the apparent frequency heard by an observer? :

Answer: (A)

Solution

; 1920 Hz would be

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Question ID VK-070001