Well lets see there is 3 feet to a yard 12 divided 3 is 4 so there is 4 yards for each wall. 4 yards times 4 walls is 16 yards of border needed.
84 square yards
you will need 84 sq. yards of wallpaper
You will need 18 pieces of border. 6 yards x 3 feet per yard = 18 feet
12.5 yards = 37.5 feet 5.5 yards = 16.5 feet
137 yards and 2 feet.
96 yards = 288 feet.96 yards is 288 feet.
10 yards.
20 yards in 60 feet
5 yards = 15 feet.
3.64 yards is 10.92 feet (yards x 3 = feet).
85 feet is 28.33 yards. (divide feet by three to get yards)
24 yards is 72 feet (yards x 3 = feet).