Q. If the radius of a sphere is doubled, its surface area becomes:

  • (A) 2 times
  • (B) 4 times
  • (C) 6 times
  • (D) 8 times
✅ Correct Answer: (B) 4 times
Explanation: Surface area ∝ r². Doubling the radius makes the surface area four times.

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

Explanation by: Mahesh Chandra
Surface area ∝ r². Doubling the radius makes the surface area four times.

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