Determine the maximum area of a rectangular piece of land that can be enclosed by 1200 m of fencing.

Answer 1

Area=L*W
Perimeter=2L+2W
L= 600-W
area=600W-W^2
darea/dw=600-2W=0 or W=300
then calculate L, and it is 300 (a square).
max area=LW=9e4