The radii of two right circular cylinders are in the ratio 2:5, and their heights are in the ratio 3:2. What is the ratio of their curved surface areas?
Show answer & explanation
Correct answer: B
Explanation
Ratio of radii = 2 : 5
Ratio of heights = 3 : 2
Curved Surface Area = 2πrh
Ratio = r × h
= (2 × 3) : (5 × 2) = 6 : 10 = 3 : 5