# Math

posted by Tyler

How do I find the surface area of a box

1. Ms. Sue

http://www.math.com/tables/geometry/surfareas.htm

2. Tyler

so if take for instance I had 5', 4' & 3' as my sides i would take 5x4x3 * 2 for a 120?

3. Ms. Sue

How did you get 120?

4. Tyler

5*4*3=60 than 60*2=120 is that right

5. Vanessa

If a is 5, b is 4, and c is 3, use the equation 2ac + 2bc + 2ab and substitute the variables.
So...
(2*5*3)+(2*4*3)+(2*5*4)
that equals 30+24+40=94

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