There are two cones. The curved surface area of one is twice that of the other. The slant height of the later is twice that of the former. Find the ratio of their radii.

Explanation

let radius of both cone are r,R

slant height are l,L
and area are A,B

given that `A=2B`

and `2l=L`


now `A=2B`

`pirl=2piRL`

`pirl=2piR2l`

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