The diameters of two cones are equal. If their slant heights are in the ratio 3:4, then find the ratio of their curved surface areas.
3 : 4
Diameters of cones are equal i.e. r1=r2=r
Curved surface area of first cone
=π×r×l1
Curved surface area of second cone
=π×r×l2
Ratio of curved surface areas
=CSA of cone 1CSA of cone 2
=π×r×l1π×r×l2=34=3:4