Question 1089254
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<pre>
(8+2*2)*(18+2*2) - 8*18 = 120 square feet.
</pre>

See similar solved problem at the link

https://www.algebra.com/algebra/homework/word/geometry/Geometry_Word_Problems.faq.question.1089249.html


and the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/Surface-area/Problems-on-the-area-of-a-rectangle-surrounded-by-a-strip.lesson>Problems on the area and the dimensions of a rectangle surrounded by a strip</A>

in this site.