A) 320 s?1
B) 360 sec?1
C) 390 sec?1
D) 420 sec?1
Correct Answer: A
Solution :
\[n'=n\left[ \frac{v+{{v}_{O}}}{v-{{v}_{S}}} \right];\]Here \[v=332\]m/s and \[{{v}_{0}}={{v}_{s}}=50\]m/s \[\Rightarrow \]\[435=n\left[ \frac{332+50}{332-50} \right]\Rightarrow n=321.12\,\,se{{c}^{-1}}\approx 320\,se{{c}^{1}}\]
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