draw the figure.
let s be the shorter side, L the longer side.
Area=sL
length of fencing= 2s+2L+2s=4s+2L
length of fencing=4s+ 2*Area/s
d(length)/ds=4-2A/s^2=0
s^2=2A/4
s= 1/2 sqrt2A=1/2 sqrt(3600)=30ft
L= 1800/30=60
Farmer taylor wants to fence a rectangular area of 1800 square feet and divided into 3 parts by fencing parallel to the shorter side. What is the minimum amount of fencing for this job?
1 answer
1 answer