Question

Marco is baking a cake for a party. The cake is in the shape of a right circular cylinder. He needs to buy frosting for the cake but doesn’t know the surface area of the cake. If the diameter of the cake pan is 13 inches, and the height is 4 inches, what is the surface area he needs to frost? Use 3.14 for π
𝜋
.(1 point)
Responses

265.33 inches2
265.33

inches
2

265.33 inches squared

163.28 inches2
163.28

inches
2

163.28 inches squared

428.61 inches2
428.61

inches
2

428.61 inches squared

1,287.88 inches2
1
,
287.88

inches
2

1,287.88 inches squared
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Answer 1

Diameter 13 in → radius r = 6.5 in. Height h = 4 in.
Total surface area = 2πr^2 + 2πrh.
= 2(3.14)(6.5^2) + 2(3.14)(6.5)(4)
= 265.33 + 163.28 = 428.61 in^2.

Answer: 428.61 inches^2.