Respuesta :

In this problem we have a rectangular prism

the surface area is equal to

SA=2*B+P*h

where

B is the area of the base

P is the perimeter of the base

h is the height of the prism

so

Find the value of B

B=(12)(25)

B=200 in2

Find the value of P

P=2(12+25)

P=