A painting is hung on a wall in such a way that its upper and lower edges are 10 ft and 7ft above the floor, respectively. An observer whose eyes are 5 ft above the floor stands x feet from the wall. How far away should the observer stand to maximize the angle subtended by the painting

Answer 1

Did you not check your previous post on this same question?

http://www.jiskha.com/display.cgi?id=1427909481