Find the curved surface area of a cone with circular base diameter 10 cm and height 12 cm
A
25 πcm2
B
65 πcm2
C
120 πcm2
D
156 πcm2
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
L2 = 122 + 52
= 144 + 25
= 169
L = √169
= 13
Curved surface Area = πrL
= 5/1 * 13/1 * π
= 65πcm2
Source: Myschool Past Questions Archive (Record #8427)