# Find the Surface Area box (5)(5)(10) h=5l=5w=10
The surface area of a box is equal to the sum of the areas of each side of the box.
2⋅(length)⋅(width)+2⋅(length)⋅(height)+2⋅(width)⋅(height)
Substitute the values of the length l=5, the width w=10, and the height h=5 into the formula.
2⋅5⋅10+2⋅5⋅5+2⋅10⋅5
Simplify each term.
Multiply 2 by 5.
10⋅10+2⋅5⋅5+2⋅10⋅5
Multiply 10 by 10.
100+2⋅5⋅5+2⋅10⋅5
Multiply 2 by 5.
100+10⋅5+2⋅10⋅5
Multiply 10 by 5.
100+50+2⋅10⋅5
Multiply 2 by 10.
100+50+20⋅5
Multiply 20 by 5.
100+50+100
100+50+100
Simplify by adding numbers.
Add 100 and 50.
150+100
Add 150 and 100.
250
250
Find the Surface Area box (5)(5)(10)

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