humen200 Posted February 13, 2014 Share Posted February 13, 2014 Question: a cone has slant height of 4 cm. base radius is not given. Total surface area is 33 over times PI. Calculate value of R. Can someone help me? Thanks Link to comment Share on other sites More sharing options...
dabaers Posted February 13, 2014 Share Posted February 13, 2014 The great below is a thing. Also google I can't math right now so look in your textbook if you've got it Link to comment Share on other sites More sharing options...
Roller Posted February 13, 2014 Share Posted February 13, 2014 Should had post it here. http://forums.backpack.tf/index.php?/topic/4982-math-questions/ Link to comment Share on other sites More sharing options...
humen200 Posted February 13, 2014 Author Share Posted February 13, 2014 Sorry but hvnt been on forums for sometime and didn't know Link to comment Share on other sites More sharing options...
AwesomeMcCoolName Posted February 13, 2014 Share Posted February 13, 2014 Surface area = piRs+piR2 33/pi=pi(Rs+R2) 33=Rs+R2 33=4R+R2 R2+4R-33=0 Link to comment Share on other sites More sharing options...
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