Q. The ratio of the curved surface area to the total surface area of a cylinder is 2 : 3. The ratio of radius to height is:
✅ Correct Answer: (A)
1 : 2
Explanation: 2πrh / 2πr(r+h) = h/(r+h) = 2/3 ⇒ h = 2r.
Explanation by: Mr. Dubey
2πrh / 2πr(r+h) = h/(r+h) = 2/3 ⇒ h = 2r.