Question 847928
{{{L/W=3/1}}}
{{{L=3W}}}
Also,
{{{P=2*L+2*W=128}}}
{{{L+W=64}}}
Substitute,
{{{3W+W=64}}}
{{{4W=64}}}
{{{W=16}}}
Then
{{{L=3(16)=48}}}