The length of a simple 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)

Question

The length of a simple 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)

${2 \over 9}$ m

${4 \over 9}$ m

${8 \over 9}$ m

${1 \over 9}$ m

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