Question 30
Mensuration of SolidsFind the curved surface area of a cone with circular base diameter 10 cm and height 12 cm.
- A.25πcm2
- B.65πcm2
- C.120πcm2
- D.156πcm2
Show the answer and explanation
Answer: B (65πcm2)
Explanation
r = 5 and the slant height l = √(122 + 52) = 13. Curved surface = πrl = 65π cm2.