Question 38
Mensuration of SolidsA cone has a base radius of 8 cm and height 11 cm. Calculate, correct to two decimal places, the curved surface area. [Take π = 22/7]
- A.341.98 cm2
- B.276.57 cm2
- C.201.14 cm2
- D.477.71 cm2
Show the answer and explanation
Answer: A (341.98 cm2)
Explanation
Slant height l = √(82 + 112) = √185 ≈ 13.601 cm. Curved surface = πrl = (22/7) × 8 × 13.601 ≈ 341.98 cm2.