Question

the diameter of two cones are equal if their stunt height are in ratio 9:4,find the ratio of their curved surface area

Answer 1

Let diameter of both cones be 2r units so radius of both cones = r units csa of a cone is pie r l so ratio of csa of both cones is pie r l’/ pie r l

Ratio=l’/l =9/4 ans hope it helps