

Subject:
Surface area of cone
Category: Science > Math Asked by: torrey2ga List Price: $2.00 
Posted:
20 Jul 2004 17:32 PDT
Expires: 19 Aug 2004 17:32 PDT Question ID: 376904 
To the nearest hundredth, find the surface area of a cone whose slant height is 9 cm and that has a base with radius 6 cm 

Subject:
Re: Surface area of cone
Answered By: deadlychiapetga on 20 Jul 2004 18:20 PDT Rated: 
Hi there, The equation for the surface area of a cone (not including the base) is A=Pi*r^2+Pi*r*s where Pi=3.14159, r=radius, and s=slant height. If you have the height instead of the slant height you can use the equation A=Pi*r*(r+(r^2+h^2)^(1/2)) So, for your equation: A=Pi*6^2+Pi*6*9 =Pi*36+Pi*54 =282.74 Additional resources: Surface Area of a Cone  WebCalc http://www.webcalc.net/calc/0040.php Deriving the Surface Area of a Cone http://www.rdrop.com/~half/Creations/Puzzles/ConeArea/ Math Question #39  Surface area of a Cone http://www.grc.nasa.gov/WWW/K12/p_test/math_9/math_p_q39.html Hope that answers your question! If not, please feel free to ask for clarification. Regards, Deadlychiapet Search terms used: cone surface area ://www.google.ca/search?q=cone+surface+area 
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