[" A.Uojectrve type questrons:- "],[" 1.Energy required to move a body of mass "m" from an orbit of radius "2R" to "3R" is "-],[[" a) "(GMm)/(12R^(2))," b) "(GMm)/(3R^(2))," c) "(GMm)/(8R^(2))," d) "(GMm)/(6R)]]