Question 294727
"three times as long as it is wide"
{{{L=3W}}}
"perimeter is 24 m"
{{{P=2*L+2*W=24}}}
{{{L+W=12}}}
Substitute from above,
{{{3W+W=12}}}
{{{4W=12}}}
{{{W=3}}}
Then from above,
{{{L=3W=3(3)=9}}}
The rectangle is 3m x 9m.