Question

Bianca is painting her room. She plans to paint the ceiling, the door, and the walls all the same color. She is not going to paint her floor. Her room is a rectangular prism shape whose floor is 10 ft by 15 ft. Her walls are 9 ft high. How many total square feet will Bianca paint? ____________ square feet

a) 315 square feet
b) 405 square feet
c) 495 square feet
d) 585 square feet

Answer 1

c) 495 square feet

To find the total square footage that Bianca will paint, calculate the area of each wall and the ceiling and add them together. The total square footage is 495 square feet.

Step-by-step explanation:

To calculate the total square footage that Bianca will paint, we first need to find the area of each wall and the ceiling. The area of the ceiling is the same as the floor, which is 10 ft by 15 ft, so it is 150 square feet. The area of each wall is the height (9 ft) multiplied by the length and width of the floor, which is 10 ft by 15 ft. Each wall has an area of 135 square feet. To find the total square footage, we add the area of the ceiling to the combined area of the walls. Thus, Bianca will paint a total of 495 square feet.