The curved surface of a right circular cone of height 15cm and base diameter 16 cm is  Choices:
A) 40 ∏cm³ B) 60 ∏cm³ C) 136 ∏cm³ D) 138 ∏cm³ E) None
Sol.   h = 14 cm, r = 7 cm. So, l = √r² + h² = √8² + (15)² = 17 cm.   ∴ 136 ∏cm³urved surface area = ∏rl = (∏ * 8 * 17) cm² = 136∏ cm²   Answer 136 ∏cm³
<result>C</result>
The curved surface of a right circular cone of height 15cm and base diameter 16 cm is