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Energy required to move a body of mass m from an orbit of radius 2R to 3R is: (A) GMm/12R (B) GMm/3R (C) GMm/8R

Energy required to move a body of mass m from an orbit of radius 2R to 3R is: (A) GMm/12R (B) GMm/3R (C) GMm/8R (D) GMm/6R

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