Answer:
112
Explanation:
SA = 2lh + 2lw + 2hw
where l = length w = width and h = height
Dimensions: l = 8, w = 2 and h = 4.
SA = 2(8)(4) + 2(8)(2) + 2(4)(2)
SA = 2(32) + 2(16) + 2(8)
SA = 64 + 32 + 16
SA = 112 km
The surface area of the rectangular prism is 112 km.