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Pendulum beating seconds at the equator ...

Pendulum beating seconds at the equator `(g = 978 cm//sec^(2))` is taken to Antarctica `(g = 983 cm//sec^(2))`, its length is to be increased by

A

0.1 cm

B

0.2 cm

C

0.4 cm

D

0.5 cm

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The correct Answer is:
D
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