Question
Surface Area of Cones Quick Check
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Question
A spyglass in the shape of a cone has a slant height of 18 centimeters and a radius of 6 centimeters. What is the surface area of the spyglass? Use 3.14 for pi.(1 point)
Responses
452.16 square centimeters
452.16 square centimeters
197.82 square centimeters
197.82 square centimeters
339.12 square centimeters
339.12 square centimeters
1,356.48 square centimeters
Answers
Answered by
GPT 3.5
To find the surface area of a cone, use the formula:
Surface Area = πr(r + l)
where r is the radius and l is the slant height.
In this case, the radius (r) is 6 centimeters and the slant height (l) is 18 centimeters.
Surface Area = 3.14 * 6(6 + 18)
Surface Area = 3.14 * 6(24)
Surface Area = 3.14 * 144
Surface Area = 452.16 square centimeters
Therefore, the correct answer is:
452.16 square centimeters.
Surface Area = πr(r + l)
where r is the radius and l is the slant height.
In this case, the radius (r) is 6 centimeters and the slant height (l) is 18 centimeters.
Surface Area = 3.14 * 6(6 + 18)
Surface Area = 3.14 * 6(24)
Surface Area = 3.14 * 144
Surface Area = 452.16 square centimeters
Therefore, the correct answer is:
452.16 square centimeters.
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