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How Do You Work Out The Surface Area Of A Box?

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Anonymous Profile
Anonymous answered
Each of the six surfaces of the box is a rectangle (if square, a square is a rectangle...).  Find the area of each of the surfaces using length X width, then add the six areas together.  That's the total surface area of the box.
Actually, they're in pairs of two - opposite surfaces are the same.  So you could find the three surfaces and multiply by 2.
Ellen S Profile
Ellen S answered
Each of the six surfaces of a box is a rectangle (a square is a rectangle).  Find the area of each of the surfaces using the formula length X width, then add the six areas together.  This is the total surface area of the box.
Also, to make it a little easier, opposite sides of the box are equal, so just find the area of the three unique sides and multiply the total by 2.

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