Respuesta :

To find the surface area of a cuboid you have to find the areas of all the faces and then add them all up together.
2*2=4
4+4=8 (adding this because there's 2 of these same faces)
9*2=18
18*4=72 (because there's 4 of these same faces)

8+72=80

So the answer is 80cm

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