SOLUTION: Hi All of the rooms of a building are rectangular with 8 foot ceilings. One room is 9 feet wide by 11 feet long. What is the combined area of the 4 walls. Thanks

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Question 1158678: Hi
All of the rooms of a building are rectangular with 8 foot ceilings. One room is 9 feet wide by 11 feet long.
What is the combined area of the 4 walls.
Thanks
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The room is a cube that measures
8 x 9 x 11
There are 2 facing wall measuring 8 x 11
There are 2 facing walls measuring 8 x 9
Let +A+ = the combined area of the 4 walls
+A+=+2%2A8%2A11+%2B+2%2A8%2A9+
+A+=+2%2A8%2A%28+11+%2B+9+%29+
+A+=+16%2A20+
+A+=+320+ ft2