Can you solve?: "There are 200 meters of wood boards to form a large rectangle, divided into four smaller rectangles. Find the length of x which gives the maximum total area of the large rectangle." (12th grade math) Why x=25 is answer?

Question

tkhunny · Answer

Isn't this the third time we've seen this one, this evening?  If you are not going to contribute to the solution, I think it would be inappropraite just to keep posting the same question.  Go look at the other two posts and answer those quetions.  It is all there.