Area of the base = 60 inches²
Height of the prism = 4 inches
perimeter of the base = 34 inches
Surface area of the rectangular prism = 256 inches²
How to find the surface area of a rectangular prism?
The surface area of a rectangular prism can be calculated as follows;
area of the base = B = 12 × 5 = 60 inches²
Height of the prism = 4 inches
Perimeter of the base is the sum of the whole side of the base of the rectangular prism.
Therefore,
perimeter of the base = 12 + 12 + 5 + 5 = 34 inches
Surface area of the rectangular prism = 2B + ph
where
- B = base area
- p = perimeter of the base
- h =height of the rectangular prism
Therefore,
Surface area of the rectangular prism = 2(60) + 34(4)
Surface area of the rectangular prism = 120 + 136
Surface area of the rectangular prism = 256 inches²
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