A vehicle, with a horn of frequency n, is moving with a velocity of 30 m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency 
. Then, n1 is equal to (take velocity of sound in air as 330 m/s)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
In this problem the case is not related to Doppler’s effect and in this type of case Doppler effect is not possible
So 
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