A car is moving towards a high cliff. The driver sounds a 
of frequency f. The reflected sound heard by the driver has frequency 2f. If v is the velocity of sound, then the velocity of the car, in the same velocity units, will be
A
B
v/3
C
v/4
D
Text Solution
Verified by ExpertsThe correct answer is:
B
1st the car is the source and at the cliff, one observes 
cliff is now source. It emits frequency 
and the observer is now the driver who observes 
or 
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