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                                    2dI< Rcentre of earth is B, then its value at9. If acceleration due to gravity at distancefrom thedistance d above the surface of earth will be [whereR is radius of earth](1) BA2(2) 2d(R+d)3(R+ d)2(4) BA32 | 
                            
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Answer»  answer is bR3/d(R+d)2i.e. if b is the acceleration at the centre of gravity is b.where R is the radius of earth.  | 
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