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### Course: Class 8 Math (India) - Hindi > Unit 10

Lesson 3: Cube and cuboid# Surface area of a box (cuboid) (Hindi)

Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape. A cuboid has 6 rectangular faces. To find the surface area of a cuboid, add the areas of all 6 faces. We can also label the length (l), width (w), and height (h) of the prism and use the formula, SA=2lw+2lh+2hw, to find the surface area.

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Ans: David Warner(1 vote)