Yeah length times width times 2 + length times height times 2+ width times height times 2
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the formula depends on the shape of the object
How do you find the suface area of a net? Answer: Do the formula for each shape that is in the net.
There is no one formula for surface area for all shapes. Basically, it is the sum of all the faces and laterals.
surface area=(perimeter of base)x(height of the shape)+(area of the base)x(2)
The answer depends on the shape whose surface area for which a formula is required.