A) 6 : 10
B) \[\sqrt{10}:3\]
C) 100 : 81
D) 81 : 100
Correct Answer: B
Solution :
\[{{K}_{1}}:{{K}_{2}}=l_{1}^{2}:l_{2}^{2}\Rightarrow \frac{{{l}_{1}}}{{{l}_{2}}}=\sqrt{\frac{{{K}_{1}}}{{{K}_{2}}}}=\sqrt{\frac{10}{9}}=\frac{\sqrt{10}}{3}\]
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