Q. The total surface area of a cone is 330 cm² and its radius is 7 cm. Using π = 22/7, the slant height is:

  • (A) 7 cm
  • (B) 8 cm
  • (C) 15 cm
  • (D) 22 cm
✅ Correct Answer: (B) 8 cm
Explanation: 330 = (22/7)×7×(7+l) = 22(7+l). Hence l = 8 cm.

Published by Krishna Sharma ⭐ 48.25K Points at 15-Jul-2026 07:13 am in Math

Explanation by: Krishna Sharma
330 = (22/7)×7×(7+l) = 22(7+l). Hence l = 8 cm.

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