Answer: 180
Step-by-step explanation: You first have to find the surface area of each face of the rectangular prism. So, we can multiply 8 and 6 to find the largest face, 8 and 3 to find the second largest face, and 6 and 3 to find the smallest face. We also know that there are two of each face.
8*6=48
8*3=24
6*3=18
Now we can either double everything now or add everything and then double it.
48*2=96
24*2=48
18*2=32
96+48+32=180
or we can do it this way:
48+24+18=90
90*2=180