Energy required to move a body of mass.m. from orbit of radii 2R to 3R

1.	Energy required to move a body of mass.m. from orbit of radii 2R to 3R is:
Answer» `(GMM)/(2R^(2))` `(GMm)/(3R^(2))` `(GMm)/(8R)` `(GMm)/(6R)` ANSWER :D

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