Question 27
Mensuration of SolidsFind the total surface area of solid circular cone with base radius 3cm and slant height 4cm. [Take π = 22/7]
- A.37 5/7cm2
- B.66cm2
- C.75 3/7cm2
- D.78 2/7cm2
- E.88cm2
Show the answer and explanation
Answer: B (66cm2)
Explanation
Total surface area = πr² + πrl = π(9 + 12) = 22/7 × 21 = 66 cm².