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CGP EDU Academic Team
Published on: September 13, 2026
The ratio of frequencies of two pendulums are 2 : 3, then their length are in ratio
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Verified by ExpertsThe correct answer is:
D
$Frequency n \propto \frac{1}{\sqrt{l}} \Rightarrow \frac{n_1}{n_2} = \sqrt{\frac{l_2}{l_1}} \Rightarrow \frac{l_1}{l_2} = \frac{n_2^2}{n_1^2} = \frac{3^2}{2^2} = \frac{9}{4}$
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