# So High Yet So Low

$A$ and $B$ are points at a distance $h$ from the surface of the earth where the value of the acceleration due to gravity is the same. $A$ is above the surface and $B$ is below the surface.

If $h=\left( \dfrac{ \sqrt{k}-1}{2}\right)R$, where $R$ is the radius of the Earth, compute $k$.

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