To find the object distance of a mirror having magnification +2 and a radius of curvature of 60 cm we will follow the following steps:As we know,According to the question:The concave mirror has a radius of curvature = 60 cmSo, Focal length = 60/2 = - 30-ve is taken because the focus of the mirror is behind the pole.Magnification = 2Also,(Let it equation -1)Here, v is image distance, u is object distance and f is focal length.Magnification formula = -v/u(Let it be equation -2)Putting the value of magnification in the above formula in equation -2we get,-v/u = 2v = - 2uNow, putting the value of v and f in equation -1 we get,u = -15 cm