karen is buying wallpaper for one wall of her bedroom which is 12ft by 13ft if the wallpaper is sold in tolls of 5 ft each how many rolls will she need to purchase
How wide are the rolls?
3 rolls
To find out how many rolls of wallpaper Karen needs to purchase, we have to calculate the total area of the wall and then divide it by the length of each roll.
1. Begin by calculating the area of the wall. Multiply the length and width of the wall to get the total square footage.
Area of the wall = Length × Width
Area of the wall = 12 ft × 13 ft
Area of the wall = 156 square feet
2. Determine the length of each roll. It is given that each roll is 5 ft long.
Length of each roll = 5 ft
3. Finally, divide the total area of the wall by the length of each roll to determine how many rolls Karen needs to purchase.
Number of rolls = Area of the wall / Length of each roll
Number of rolls = 156 square feet / 5 ft
Number of rolls = 31.2 rolls
Since you cannot purchase a fraction of a roll, Karen needs to purchase 32 rolls of wallpaper to cover the entire wall.