A dedicated sports car enthusiast polishes the inside andoutside surfaces of a hubcap that is a section of a sphere. When heholds the hubcap a certain distance away from his face, he sees animage of his face 30.1 cm in back of the hubcap. He then turns thehubcap over, keeping it the same distance from his face. He nowsees an image of his face 10.7 cm in back of the hubcap.
How far is his face from the hubcap?
What is the radius of curvature of the hubcap?