Answer:
69.6 square inches.
Explanation:
You do:
2.4 x 1.5 =3.6
2.4 x 8 = 19.2
1.5 x 8 = 12
Add them up together. Remember that surface area is the sum of all of the sides of a shape. The equations above represent the surface area for each individual side. This adds up to 3 sides because there are three equations. If we add them up together, we get
3.6 + 19.2 + 12 = 34.8
Since a rectangular prism has 6 sides, 34.8 only covers 3 sides. We can multiply by 2 to get the surface area of all the sides. We can do this because there are always 2 sides that correspond to each other on a rectangular prism.
34.8 x 2 = 69.6 square inches as the surface area
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To find volume, you multiply all of the sides together.
1.5 x 8 x 2.4 = 28.8 cubed inches