An observer is moving away from source of sound of frequency 100 Hz. H – McqOptions

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1.	An observer is moving away from source of sound of frequency 100 Hz. His speed is 33 m/s. If speed of sound is 330 m/s, then the observed frequency is [EAMCET (Engg.) 1995; CPMT 1999]
A.	90 Hz
B.	100 Hz
C.	91 Hz
D.	110 Hz
Answer» B. 100 Hz

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