Question
a farmer wants to build a rectangular garden with a river as one side.what is the area of the biggest garden that he can fence with 220 meters of fencing materials?
Answers
Steve
110*55 = ?
George
L=LENGHT W=WIDTH
L+2w=220
L=220-2W
LW=AREA
A=W(L)
A=W(220-2W)
A=-2W^2- 2W^2
A=-2(W^2-110W+55^2-55^2)
A=-2(W-55)^2+6050
W=55
L=220-55-55
=110
L+2w=220
L=220-2W
LW=AREA
A=W(L)
A=W(220-2W)
A=-2W^2- 2W^2
A=-2(W^2-110W+55^2-55^2)
A=-2(W-55)^2+6050
W=55
L=220-55-55
=110