Question

Surface Area:
12 in 2 = Length
8 in 2 = Width
2 1/2 in 2 = Height

Answer 1

@AmazingApples00 @bcimkenz @DiamondBear3299 @dinopyte @Here_to_Help15 @Michele_Laino @shifuyanli @sleepyjess @CausticSyndicalist

Answer 2

@Michele_Laino can you help me?

Answer 3

If your solid shape is a parallelepiped, then please you have to perform this computation, in order to find the total area S:
S=2*[(12*8)+(8*5/2)+(12*5/2)]
since 2 1/2=2+1/2=5/2
and
Length=12 inches,
Width= 8 inches
and height= 2+1/2 inches