The radii of the bases of two cylinders and their heights are in the ratio 4 : 3 and 9 : 8, respectively. Find the ratio of their curved surface areas.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 3 : 2.
Curved surface area of cylinder =
Required ratio = 2 × (22/7) × 4 × 9 : 2 × (22/7) × 3 × 8
⇒ 36 : 24 = 3 : 2