The curved surface area of a right circular cone is twice that of an other right circular cone. If the slant height of the second cone is twice that of the first cone, find the ratio of the radius of first cone to that of second cone.
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CSA of 1st cone=2(CSAof 2nd cone)
"l" of 2nd cone =2(l of 1st cone)
therefore,2πrl/πr2l=2/2=1/1
ratio=1:1
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"l" of 2nd cone =2(l of 1st cone)
therefore,2πrl/πr2l=2/2=1/1
ratio=1:1
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