Question 41
Mensuration of SolidsFind the total surface area of a solid cone of radius 2√3cm and slanting side 4√3cm.
- A.8√3πcm2
- B.24πcm2
- C.15√3πcm2
- D.36πcm2
Show the answer and explanation
Answer: D (36πcm2)
Explanation
Total surface area = πr² + πrl = π(12) + π(2√3)(4√3) = 12π + 24π = 36πcm².