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?

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