Can someone take tell me why i cannot optimize the question below in terms of the base of the window? (this is a Calculus I question from Paul's Notes)
We want to construct a window whose middle is a rectangle and the top and bottom of the window are semi-circles. If we have 50 meters of framing material what are the dimensions of the window that will let in the most light?

Question

Can someone take tell me why i cannot optimize the question below in terms of the base of the window? (this is a Calculus I question from Paul's Notes) 
We want to construct a window whose middle is a rectangle and the top and bottom of the window are semi-circles.  If we have 50 meters of framing material what are the dimensions of the window that will let in the most light?

dessyj1 · Answer

|dw:1431828770072:dw| this is what the window is supposed to look like