Please solve it

Dear Student,
we consider,R=radius of earth=6400 km

a c c o r d i n g t o t h e q u e s t i o n, \frac{1}{2} \sqrt{\frac{2 G M}{R}} = \sqrt{\frac{G M}{R + h}} \frac{1}{4} \times \frac{2 G M}{R} = \frac{G M}{R + h} 2 R = R + h h = 2 R - R = R w h e r e, h = h e i g h t o f t h e s a t e l l i t e

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