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The area of the base of a prism is 21 cm2. The perimeter of the base is 20 cm. The height of the prism is 8 cm.. . What is the surface area of the prism?.
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The area of the base of a prism is 21 cm2. The perimeter of the base is 20 cm. The height of the prism is 8 cm.. . What is the surface area of the prism?.

User Robbie Liu
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The surface area is the sum of the base areas and the product of the perimeter of the base and the height:
A = 2 · 21 + 20 · 8 = 42 + 160 = 202 cm²
User Artem Shitov
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