Question 953777
{{{(1/2)bh=120}}}
{{{bh=240}}}
{{{b=240/h}}}
.
.
{{{b^2+h^2=26^2}}}
{{{(240/h)^2+h^2=26^2}}}
{{{240^2+1+h^4=26^2h^2}}}
{{{h^4-676h^2+57600=0}}}
{{{h^4-676h^2+114244+57600=114244}}}
{{{(h^4-676h^2+114244)+57600=114244}}}
{{{(h^2-338)^2=56644}}}
{{{h^2-338=0 +- 238}}}
{{{h^2=576}}} and {{{h^2=100}}}
{{{h=24}}} and {{{h=10}}}
If 
{{{h=24}}} then,
{{{b=240/24}}}
{{{b=10}}}
If 
{{{h=10}}} then,
{{{b=240/10}}}
{{{b=24}}}
So then,
{{{P=10+24+26}}}
{{{P=60}}}{{{m}}}