Question 1090571
{{{P=2(L+W)=105}}}
and
{{{L/W=2/1}}}
{{{L=2W}}}
Substituting,
{{{2(2W+W)=105}}}
{{{2(3W)=105}}}
{{{2W=35}}}
{{{W=35/2}}}
So,
{{{L=2(35/2)}}}
{{{L=35}}}
and
{{{A=LW}}}
{{{A=35(35/2)}}}
{{{A=1225/2}}}{{{cm^2}}}