A right circular cone has a radius of 9 cm and a height of 40 cm. What is the slant height of the cone?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 41 cm.
Slant height, l2 = r2 + h2
⇒ l2 = 92 + 402
⇒ l2 = 81 + 1600
⇒ l2 = 1681
⇒ l = 41 cm