The length of a seconds pendulum at a height h = 2R from earth surface will be:
(Given R = Radius of earth and acceleration due to gravity at the surface of earth, g = $$\pi$$2 ms$$-$$2)
- A$${2 \over 9}$$ m
- B$${4 \over 9}$$ m
- C$${8 \over 9}$$ m
- D$${1 \over 9}$$ m
✓ Correct answer: D
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