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First of all, there's probably no other way to find it except with math.

-- Add up:

(length of the box times width of the box) plus

(length of the box times height of the box) plus

(width of the box times height of the box).

-- Double the result.

-- You have the total area of the cardboard used to make the box, including its top.

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14y ago
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Q: How do you find the total area of a flat box in math?
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