How many 4-feet by 8-feet drywall sheets are needed to fully cover all walls and the ceiling of a room that is 12 feet wide and 8 feet long with an 8-foot height?

How many 4-feet by 8-feet drywall sheets are needed to fully cover all walls and the ceiling of a room that is 12 feet wide and 8 feet long with an 8-foot height?

• A. 10
• B. 11
• C. 13
• D. 15

Answer: (C)

To determine the number of 4-feet by 8-feet drywall sheets needed to cover the walls and ceiling of a room that is 12 feet wide, 8 feet long, and has an 8-foot height, we first need to calculate the total surface area that needs to be covered. 1. **Calculate the area of the walls:** - The room has two walls that are 12 feet wide and 8 feet high. The area of each of these walls is: \[ \text{Area of each 12-feet wall} = \text{Width} \times \text{Height} = 12 \, \text{feet} \times 8 \, \text{feet} = 96 \, \text{square feet} \] - Therefore, for both of these walls: \[ 96 \, \text{square feet} \times 2 = 192 \, \text{square feet} \] - The room also has two walls that are 8 feet wide and 8 feet high. The area of each of these walls is: \[ \text{Area of each 8-feet wall

To determine the number of 4-feet by 8-feet drywall sheets needed to cover the walls and ceiling of a room that is 12 feet wide, 8 feet long, and has an 8-foot height, we first need to calculate the total surface area that needs to be covered.

1. Calculate the area of the walls:

• The room has two walls that are 12 feet wide and 8 feet high. The area of each of these walls is:

[

\text{Area of each 12-feet wall} = \text{Width} \times \text{Height} = 12 , \text{feet} \times 8 , \text{feet} = 96 , \text{square feet}

]

• Therefore, for both of these walls:

[

96 , \text{square feet} \times 2 = 192 , \text{square feet}

]

• The room also has two walls that are 8 feet wide and 8 feet high. The area of each of these walls is:

[

\text{Area of each 8-feet wall