Subject: mathqa
Question: three walls have wallpaper covering a combined area of 280 square meters . by overlapping the wallpaper to cover a wall with an area of 180 square meters , the area that is covered by exactly two layers of wallpaper is 36 square meters . what is the area that is covered with three layers of wallpaper ?
Option: 
A: 120 square meters
B: 42 square meters
C: 5 square meters
D: 32 square meters
Answer: D