Question 43
Mensuration of SolidsThe height of a right circular cone is 4 cm. The radius of its base is 3 cm. Find its curved surface area.
- A.9π cm2
- B.15π cm2
- C.16π cm2
- D.20π cm2
Show the answer and explanation
Answer: B (15π cm2)
Explanation
Slant height = √(32 + 42) = 5 cm. Curved surface = πrl = π × 3 × 5 = 15π cm2.