algebra
posted by Sejul .
A man has 400 meters of fencing and wants to fence in a rectangular field next to a straight river. Assuming that no fencing is needed along the river, what are the dimensions of the field with the largest possible area?

algebra 
PsyDAG
The largest area would be a square, or as close to a square as you can get, 400/3 by 400/3.
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