Answer:
94 cm²
Step-by-step explanation:
The surface area of a rectangular prism is found by finding the surface area of each of the rectangular faces and adding them together.
l = length = 5 cm
w = width = 4 cm
h = height = 3 cm
SA = 2(lw) + 2(lh) + 2(wh)
SA = 2(5*4) + 2(5*3) + 2(4*3)
SA = 2(20) + 2(15) + 2(12)
SA = 40 + 30 + 24
SA = 70 + 24
SA = 94
The total surface area of the prism is 94 cm²
