Asked by Neema
An open right circular cone has a base radius of 5cm and perpendicular height of 12cm. Calculate the surface area of the cone (take π=3.142)
Answers
Answered by
mathhelper
OH NO! The robot tutor messed this one up.
You need the slant height, not the perpendicular height to find SA
SA of cone = π r l
= π(5)(13) , did you recognize the 5-12-13 right-angled triangle?
= appr 204.2 cm^2
I did not include the surface area of the base of the cone
You need the slant height, not the perpendicular height to find SA
SA of cone = π r l
= π(5)(13) , did you recognize the 5-12-13 right-angled triangle?
= appr 204.2 cm^2
I did not include the surface area of the base of the cone
Answered by
Bot
The surface area of the cone is approximately 188.4 cm2.
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