There is a concentric hole of radius R in a solid sphere of
radius 2R. Mass of remaining portion is M, then the
gravitational potential at centre is
(a) -5GM/7R
(b) -7GM/14R
(c) -3GM/7R
(d) -9 GM/14R
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I think 2 answer is right I think
gar mera answer right hai to.plz like kro do
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