You can use a composite figure to model a room, then find blank to decide how much paint you need to paint the room. What is the blank?

A. Volume

B. Surface Area

Option B

Surface Area

Step-by-step explanation:

First of all we need to understand what the two terms - surface area and volume mean, and their impact on the choice of paint quantity.

The surface area of the room is the area covered by the walls of the room. As a matter of fact, these are the same walls that are to be painted. If the surface area is determined, it will be easy to know the quantity of paint that will be needed.

The volume of the room however, is the amount of space enclosed in the interior. We can see it as the space occupied by the air in the room. This cannot be used to approximate the quantity of paint to be used, as this will lead to over estimation.

The surface area covered by the walls is what is needed to determine the quantity of paint needed