The perimeter of the room was calculated in question 6, and it is 54 feet.
Since the borders come in 5-yard rolls, let's first convert 54 feet to yards.
Each yard has 3 feet, so we can divide the amount of feet by 3 to get it converted to yards:
Thus, the perimeter of the room is 18 yards. Since each roll has 5 yards,we will need:
Abou 3.6 rolls, but since we can only have whole rolls, we will have to approximate it to 4 rolls.