The correct option is A 3: 2
Curved Surface Area of a Cylinder of Radius "r" and height "h" =2πrh
Let r1 and h be the radius and height of the first cone and r2 and h be the radius and height of the second cone.
Now, ratio of their surface area is calculated as:
S1:S2
=2πr1h:2πr2h
=r1:r2
=3:2
Hence, their surface areas are in the ratio 3:2