Find the curved surface area of a cone with circular base diameter 10 cm and height 12 cm
- A.
25 πcm^{2} - B.
65 πcm^{2} - C.
120 πcm^{2} - D.
156 πcm^{2}
Correct Answer: Option B
Explanation
L^{2} = 12^{2} + 5^{2}
= 144 + 25
= 169
L = √169
= 13
Curved surface Area = πrL
= ^{5}/_{1} * ^{13}/_{1} * π
= 65πcm^{2}