1.

A source of sound is travelling towards a stationary observer. The frequency of sound heard by the observer is of three times the original frequency. The velocity of sound is v m/sec. The speed of source will be [MP PET 1991]

A.            \[\frac{2}{3}v\]                   
B.            v
C.            \[\frac{3}{2}v\]                   
D.            3v
Answer» B.            v


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