Question 979436
{{{ x=width }}}
{{{ l=3x }}}
{{{ lw=72 }}}

{{{ 3x(x)=72 }}}
{{{ 3x^2=72 }}}
{{{ x^2=72 }}}
{{{ x=2sqrt(6) }}}

{{{ l=3(2sqrt(6)) }}}
{{{ l=6sqrt(6) }}}


{{{ (2sqrt(6))(6sqrt(6))= 72 }}}