Surface area is what it seems to be. All of the area of the solid's faces together. Like a cube, just find the areas of all of the squares that make the cube then add them together.
Since 83-59=24, 83 is added by 28 so your answer would be 111.
The math club could rent the room for up to 8 hours. I have also attached a picture of the work in case you need it.
Step-by-step explanation:
Case 1 :


Case 2 :

