Grace wants to put a wallpaper border around the top of the room. Each roll of the wallpaper border is 120 inches long. how many roll will she need.
To find out how many rolls of wallpaper border Grace will need, we first need to determine the length of the room's perimeter. Let's assume the room is rectangular.
To calculate the perimeter, we need to add up the lengths of all four sides. Let's say the room's width is W inches, and the room's length is L inches.
Perimeter (P) = 2 * (Width + Length)
Once we have the perimeter, we can calculate the number of rolls needed. Each roll is 120 inches long.
Number of rolls needed = Perimeter / Roll length
Now let's calculate the number of rolls Grace will need:
1. Measure the length (L) and width (W) of the room in inches.
2. Calculate the perimeter using the formula: P = 2 * (W + L).
3. Divide the perimeter by the length of each roll. Number of rolls needed = P / 120.
By following these steps, you can determine the number of rolls of wallpaper border Grace will need for the room.