Nikolai is making an L-shaped platform for his collection of action figures.

What is the surface area of the platform if it is 3 in. thick?
16in.
10in.
6in.
4in.
4in.
12in.

? in.2

The two dimensions of the platform are 16 inches and 10 inches.

Surface area = 2*(16*10) + 2*(16*3) + 2*(10*3) = 320 + 96 + 60 = 476 in^2

Therefore, the surface area of the platform is 476 in^2.