1.

A racing car moving towards a cliff, sounds its horn. The driver observes that the sound reflected from the cliff has a pitch one octave higher than the actual sound of the horn. If \[v\] is the velocity of sound, then the velocity of the car is [KCET 2002; CBSE PMT 2004]

A.            \[v/\sqrt{2}\]                       
B.            \[v/2\]
C.            \[v/3\]                                    
D.            \[v/4\]
Answer» D.            \[v/4\]


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