deduce the height at which the the value g is same as at depth of R/2
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Explanation:
g at height 'h'
gh'=g(1-2h/R)
..
g at the depth
gd'=g(1-d/R)
As given.
gh=gd
g(1-2h/R) =g(1-d/R)
(1-2h/R) =(1-d/R)
1-2h/R = 1-R/2/R
R-2h/R =
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