A) \[540\,m{{s}^{-1}}\]
B) \[5.4m{{s}^{-1}}\]
C) \[0.184\text{ }m{{s}^{-1}}\]
D) \[9\text{ }m{{s}^{-1}}\]
E) \[48.6\text{ }m{{s}^{-1}}\]
Correct Answer: D
Solution :
Frequency, \[n=\frac{54}{60}\] \[\Rightarrow \] \[n=\frac{9}{10}\] \[\therefore \]Velocity, \[v=n\lambda \] \[=\frac{9}{10}\times 10=9\,m/s\]
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