Question 1052603
I'm assuming the bulletin board is a rectangle.
{{{P=2L+2W}}}
{{{2L+2W=136}}}
{{{L+W=68}}}
and
{{{L=2+2W}}}
Substituting,
{{{2+2W+W=68}}}
{{{3W=66}}}
{{{W=22}}}
So then,
{{{L+22=68}}}
{{{L=46}}}