A) 20 m/s
B) 2 m/s
C) 200 m/s
D) 2000 m/s
Correct Answer: A
Solution :
[a] Here, \[v'=\frac{9}{8}v\] Source and observer are moving in opposite direction, therefore, apparent frequency \[v'=v\times \frac{(v+u)}{(v-u)}\Rightarrow \frac{9}{8}\,v=v\times \frac{340+u}{340-u}\] \[\Rightarrow \,u=\frac{340}{17}=20\,m/\sec \]You need to login to perform this action.
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