Question 973110
L=length; W=width
P=2(L+W)
36m=2(L+W)
18m=L+W
18m-W=L Use this to substitute for L.
.
{{{A=LW}}} Substitute for L.
{{{80m^2=(18m-W)(W)}}}
{{{80m^2=18W-W^2}}}
{{{0=-W^2+18W-80}}}
{{{0=W^2-18W+80}}}
{{{0=(W-8)(W-1)}}}
{{{W-8=0}}} {{{or}}} {{{W-10=0}}}
{{{W=8}}} {{{or}}} {{{W=10}}}
When width=8m, length=18m-w=18m-8m=10m.
When width=10m length=18m-10m=8m
Dimensions are either 8m x 10m or 10m x 8m.