At what height h above earth, the value of g becomes g/2 (where R=radius of earth)?

At what height h above earth, the value of g becomes g/2 (where R=radius of earth)?

Options

(a) (√2-1)R
(b) √2R
(c) (√2+1)R
(d) R/√2

Correct Answer:

(√2-1)R

Explanation:

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