A source of sound is travelling with a velocity 40 km/hour towards obs – McqOptions

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1.	A source of sound is travelling with a velocity 40 km/hour towards observer and emits sound of frequency 2000 Hz. If velocity of sound is 1220 km/hour, then what is the apparent frequency heard by an observer [AFMC 1997]
A.	2210 Hz
B.	1920 Hz
C.	2068 Hz
D.	2086 Hz
Answer» D. 2086 Hz

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