Linda is painting her bedroom. Her bedroom has 4 walls, with the room being 20 feet wide by 20 feet long by 8 feet tall. One wall has a 3-foot by 7-foot doorway. A second wall has a 6-foot by 4-foot window. A third wall has a 5-foot by 7-foot doorway to a walk-in-closet. And the fourth wall is completely solid. What is the total area of wall space that Linda will have to paint?
Let's be accurate as possible and think first.
560
The solid wall is 8 ft.

* 20 ft.

= 160 sq.

ft.

The doorway is 3 ft.

* 7 ft.

= 21 sq.

ft.

The window is 6 ft.

* 4 ft.

= 24 sq.

ft.

The closet door is 5 ft.

* 7 ft.

= 35 sq.

ft.

The total area of the doors and windows is 21 sq.

ft + 24 sq.

ft.

+ 35 sq.

ft.

= 80 sq.

ft.

The solid wall is 160 sq.

ft.

, so before the areas of the doors and window are taken into account, the total wall area is 4 * 160 sq.

ft.

= 640 sq.

ft.

Taking into account the doors and window, the total wall area Linda will have to paint is 640 sq.

ft.

- 80 sq.

ft.

= 560 sq.

ft.

.

The answer: 560