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The periods of a pendulum on two planets are in the ratio 3:4, the acceleration due to gravity on them are in the ratio

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a
9:16
b
3:4
c
4:3
d
16:9

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detailed solution

Correct option is D

T=2πlg  ⇒T1T2=g2g1 ⇒342=g2g1 ⇒g1g2=169


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