When making a book cover, Anwar adds an additional 20 sqaure inches to the surface area to allow for overlap. How many square inches of paper will Anwar use to make a book cover for a book 11 inches long, 8 inches high, and 1 inch wide?

(Use surface area)

Respuesta :

40 because 11+1+8=20 20×2=40
11 plus 1 plus 8 times two equals 20 times 2