SOLUTION: Ho do I find out what is the surface area of a box that is 5 feet long, 3 feet wide and 7 feet high?

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Question 142497: Ho do I find out what is the surface area of a box that is 5 feet long, 3 feet wide and 7 feet high?
Answer by benni1013(206) About Me  (Show Source):
You can put this solution on YOUR website!
The easiest way to solve this is make sure you get all the possible combination of numbers,multiply them, add them together and double it.
5x3=15
5x7=35
3x7=21
Sum equals 71 double it to get the answer of 142.