Q. The radius of a sphere is tripled. Its surface area becomes:

  • (A) 3 times
  • (B) 6 times
  • (C) 9 times
  • (D) 27 times
✅ Correct Answer: (C) 9 times
Explanation: Surface area ∝ r². Hence 3² = 9 times.

Published by Mahesh Chandra ⭐ 7.32K Points at 15-Jul-2026 08:02 pm in Math

Explanation by: Mahesh Chandra
Surface area ∝ r². Hence 3² = 9 times.

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