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A cuboid has 6 sides/faces/flat surfaces.
derivation of surface area of cuboid
One flat surface is a table. Many flat surfaces are facets.
A cuboid is a 3 dimensional object and 3 measures are required for the total surface area of a cuboid.
Lateral surface area of a cuboid = 2 (Length + Breadth) × Height Lateral surface area of a cube = 4 × Side2