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Q.

The ratio of frequencies of two pendulums are 2 : 3, then their lengths are in ratio

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a

2/3

b

3/2

c

4/9

d

9/4

answer is D.

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Detailed Solution

Frequency n∝1l⇒n1n2=l2l1⇒l1l2=n22n12=3222=94
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