NEET Questions Solved


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 

(1) 23v

(2) v

(3) 32v

(4) 3v

(1) n'=nvvvSn'n=vvvS

vvvS=3vs=2v3

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