What is the surface area of a rectangular prism with edge lengths of 2,3 and 4 ?

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A rectangular prism has six faces.

Since the prism has edge lengths 2,3 and 4 , then the prism has two faces with dimensions $2 \times 3$ (each has area 6 ), two faces with dimensions $2 \times 4$ (each has area 8 ), and two faces with dimensions $3 \times 4$ (each has area 12).

Therefore, the surface area of the prism is $2(6)+2(8)+2(12)=52$.