Answers

2014-09-05T22:17:18+08:00
Curved surface area of a cone is given by the formula     πrl
 r = radius of base of cone    &   l  = slant height of cone
if given the radius and vertical height of the cone you must make use of
Pythagoras theorem to find the slant height
   l² = r²+h²        / h = vertical height
   l  =  √(r²+h²)
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