Question

Farmer ed has 200 meters of​ fencing, and wants to enclose a rectangular plot that borders on a river. if farmer ed does not fence the side along the​ river, find the length and width of the plot that will maximize the area. what is the largest area that can be​ enclosed

Answer 1

I have no "real" answer, because the river may curve...

Fun answer: farmer Ed clearly does not realize you can Not create a rectangular plot that borders a river unless it is artificial and instead of dirt, it would Need to be concrete to ensure a constant straight edge; although even in that case, it would no longer Be a river! It would be a mote or channel. So this problem is unsolvable at his current standards.