Class 12-Maxima & Minima-Prove that the radius of the right circular cylinder of greatest curved

Class 12-Maxima & Minima-Prove that the radius of the right circular cylinder of greatest curved

Class 12-Maxima & Minima-RD SHARMA Pg 18.63, EXAMPLE-35, Prove that the radius of the right circular cylinder of greatest curved surface which can be inscribed in a given cone is half of that of the cone .[CBSE 2010C,2012,2013]