SOLUTION: a paper cone is unfolded to reveal that is is formed using a sector of a circle with radius 3 inches. if the arc length around the top of the cone is 7.7 inches, what is the surfac
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Question 986753: a paper cone is unfolded to reveal that is is formed using a sector of a circle with radius 3 inches. if the arc length around the top of the cone is 7.7 inches, what is the surface area of the outside of the cone?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Compare the arc length to the circumference of the whole circle (although only a sector is available).
, the full circumference.
Full circle area WOULD be .
Your sector's area is
.
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