Question

Christopher is going to install wallpaper on the four walls of his room. Two of the walls are 14 feet long by 9 feet high. The other two walls are 20 feet long by 9 feet high. His options at the wallpaper store are below.

Answer 1

14 x 9 = 126 sq feet
20 x 9 = 360 sq feet

360 + 126 = 486 sq feet

Christopher needs 486 sq feet of wallpaper