Q. If the height of a cylinder is increased by 20% and the radius is decreased by 10%, then the curved surface area changes by:

  • (A) 8% increase
  • (B) 8% decrease
  • (C) 10% increase
  • (D) 12% decrease
✅ Correct Answer: (A) 8% increase
Explanation: CSA ∝ rh = 1.2 × 0.9 = 1.08 ⇒ 8% increase.

Published by Mr. Dubey ⭐ 111.54K Points at 15-Jul-2026 06:30 am in Math

Explanation by: Mr. Dubey
CSA ∝ rh = 1.2 × 0.9 = 1.08 ⇒ 8% increase.

📝 Notes by Other Students/ Teachers

📊 Question Analytics

👁️
44
Total Visits
📽️
4 mo ago
Published
🎖️
Mr. Dubey
Publisher
📈
90%
Success Rate