A gallon of paint covers about 400 ft². How many gallons would you need to paint the walls of a room 10 feet wide, 14 feet long, and 8 feet tall?

You will need 1120 gallons square

No. You're way off.

2 * 10 * 8 = 160
2 * 14 * 8 = 224

224 + 160 = 384 square feet

To determine the number of gallons needed to paint the walls of a room, we need to calculate the total surface area of the walls and then divide it by the coverage area of one gallon of paint.

First, let's find the surface area of the walls:
The room has four walls, and we need to calculate the area of each wall separately.

1. The first wall is 10 feet wide and 8 feet tall, so its area is 10 feet * 8 feet = 80 square feet.
2. The second wall is also 10 feet wide and 8 feet tall, so its area is also 10 feet * 8 feet = 80 square feet.
3. The third wall is 14 feet long and 8 feet tall, so its area is 14 feet * 8 feet = 112 square feet.
4. The fourth wall is also 14 feet long and 8 feet tall, so its area is also 14 feet * 8 feet = 112 square feet.

Now, let's calculate the total wall area by summing up the areas of all four walls:
Total wall area = 80 square feet + 80 square feet + 112 square feet + 112 square feet = 384 square feet.

Next, we can determine how many gallons of paint are needed by dividing the total wall area by the coverage area of one gallon of paint:
Number of gallons needed = Total wall area / Coverage area of one gallon of paint

Since one gallon covers about 400 square feet, the number of gallons needed would be:
Number of gallons needed = 384 square feet / 400 square feet ≈ 0.96 gallons.

Therefore, you would need approximately 0.96 gallons of paint to cover the walls of the room.