Correct Option: C

Let at h height, the weight of a body becomes	1	th of its weight on the surface.
	16

​​​
W_h = 16 W_s....(i) ​
⇒​16 W_s = W_s​....(ii)

g' =	G M
	(Re + h)2

Similarly , g =	G M
	Re2

	g'	=	Re2	⇒ g' = g		1 +	h		-2
	g		(Re + h)2				R

⇒ W_h = 16 W_s

g' =	g
	16

g' = 16g		1 +	h		2
			R

	1	=		1 +	h		-2	⇒ 4 = 1 +	h
	16				R				R

h = 3R