Question 30567
A = l * w
l = 2w
A = 162 in^2
{{{ A = lw }}} substitute the values in 
{{{ 162 = 2w * w }}}
{{{ 162 = 2w^2 }}}
{{{ 81 = w^2 }}}
{{{ 9 = w }}} substitute 9 in to find the length
{{{ l = 2w }}}
{{{ l = 2*9 }}}
{{{ l = 18 }}} substitute the L and W in to find perimeter
{{{ P = 2(l+w) }}}
{{{ P = 2(18 + 9) }}}
{{{ P = 2(27) }}}
{{{ P = 54 }}}