How many gallons of paint are needed to paint the walls of a rectangular prism-shaped room that is 18 ft by 10 ft and 8 ft high if 1 gallon of paint covers 40 sq ft? assume there are no doors or windows.

11.2 gallons.

Step-by-step explanation:

We have been given that a rectangular prism-shaped room is 18 ft by 10 ft and 8 ft high. We are asked to find the gallons of paint needed to paint the walls of room.    

First of all, we will find area of walls, we need to paint.

2 walls would be

2 walls would be

We have been given that 1 gallon of paint covers 40 sq ft. To find the gallons of paint needed, we will divide total area by 40.

Therefore, 11.2 gallons of paint are needed to paint the walls.

17 1/3

step-by-step explanation: