A) 448 Hz
B) 455 Hz
C) 440 Hz
D) 468 Hz
Correct Answer: D
Solution :
Apparent frequency heard by stationary observer \[n'=n\,\left( \frac{V}{V-{{V}_{s}}} \right)\] Given, \[V=330\,m{{s}^{-1}},\,\,{{V}_{s}}=20\,m{{s}^{-1}}\]and n = 440 Hz \[\therefore \] \[n'440\,\,\left( \frac{330}{330-20} \right)\] \[=468.38\approx \,468\,Hz\]You need to login to perform this action.
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