Question 910767
<pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
     *[illustration rectangle.png].
A = Lw
(w+4)w = 60cm^2
w^2 + 4w - 60 = 0 (Tossing out the negative solution for unit measure)
(w +10)(w-6) = 0
w = 6cm  and L = 10cm {{{6+4}}}
And...checking
A = 60cm^2
Wish You the Best in your Studies.