Question

Linn plans to wallpaper the 4 walls in her bedroom. The measurements are 9’ by 11’ by 8’. How many single rolls of wallpaper should she buy?
*Note: Each single roll covers 72 square feet.

Answer 1

Answer: There are 4 rolls she should buy.

Step-by-step explanation:

Since we have given that

Length of wall = 9 feet

Width of wall = 11 feet

Height of wall = 8 feet

As we know the formula for "Area of four walls ":

$Area=2(l+b)h\\\\Area=2(9+11)\times 8\\\\Area=2\times 20\times 8\\\\Area=320\ ft^2$

Area of each single roll covers = 72 square feet

So, Number of single rolls of wallpaper is given by

$\frac{\text{ Area of 4 walls}}{\text{ Area of single roll}}\\\\=\frac{320}{72}\\\\=4.44\\\\=4$

Hence, there are 4 rolls she should buy.