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Q.

A man weigh ‘W’ on the surface of the earth and his weight at a height of ‘R’ from surface of earth is (Radius of the earth)

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a

W4

b

W2

c

W

d

4W

answer is A.

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Detailed Solution

g=GMR2& gh=GMR+h2⇒ghg=RR+h2 W=mg;W'=mg'=mgRR+h2=WRR+R2=WR2R2=W4
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