Question

At what height from the ground will the value of ‘ g ’ be the same as that in 10 km deep mine below the surface of earth

Answer 1

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Answer 2

Answer:

$g\: at \: earth \: \: of \: below \: = g\: at \: heigh \: of \: h \\ = > g (1 - \frac{10}{6400} ) = g(1 - \frac{2h}{6400} ) \\ = > 2h = 1 \\ = > h = 5km$