Question

beth wants to paint the four walls of her rectangular bedroom. her room is 10 feet wide, 13 feet long, and 8 feet high. she will not paint her rectangular door, which is 3 feet wide and 7 feet high. what is the total area of the walls that beth needs to paint? a. 347 square feet b. 368 square feet c. 578 square feet d. 1019 square feet e. 1040 square feet

Explanation:

Step1: Calculate area of two pairs of walls

The two walls with dimensions 10 feet (width) and 8 feet (height) have a combined area of $2\times(10\times8)=160$ square - feet. The two walls with dimensions 13 feet (length) and 8 feet (height) have a combined area of $2\times(13\times8)=208$ square - feet.

Step2: Calculate area of the door

The area of the door with dimensions 3 feet (width) and 7 feet (height) is $3\times7 = 21$ square - feet.

Step3: Calculate the area to be painted

The total area of the four walls is $160 + 208=368$ square - feet. Subtract the area of the door from the total area of the walls: $368-21 = 347$ square - feet.

Answer:

A. 347 square feet