The surface area of a rectangular prism is 2 times the area of the bases + the perimeter x the height. Given the information above, all we have to do is substitute it into the formula.
SA = 2B + ph SA = 2(8x3) + 2(8+3) x 13 SA = 48 + 26 x 11 SA = 48 + 286 SA = 334
