The ratio of curved surface area of two cones is 1 : 9 and t

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The ratio of curved surface area of two cones is 1 : 9 and the ratio of slant height of the two cones is 3 : 1. What is the ratio of the radius of the two cones?

[SSC CPO 3 July 2017 Afternoon Shift With Answers]

A 1 : 3

B 1 : 9,

C 1 : 27,

D 1 : 1,