A) \[\sqrt{11}:3\]
B) \[3:\sqrt{11}\]
C) 1 : 2
D) 3 : 4
Correct Answer: A
Solution :
\[{{v}_{rms}}=\sqrt{\frac{{{(1)}^{2}}+{{(2)}^{2}}+{{(3)}^{2}}+{{(4)}^{2}}+{{(5)}^{2}}}{5}}\] \[=\sqrt{11}\,\,km/s\] \[{{v}_{av}}=\frac{1+2+3+4+5}{5}=3\,km/s\] \[\therefore \] \[\frac{{{v}_{rms}}}{{{v}_{av}}}=\frac{\sqrt{11}}{3}\]
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