2005
Mathematics
JAMB
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
Correct Answer: 65 πcm2
Explanation
L2 = 122 + 52 = 144 + 25 = 169 L = √169 = 13 Curved surface Area = πrL = 5/1 * 13/1 * π = 65πcm2
L2 = 122 + 52 = 144 + 25 = 169 L = √169 = 13 Curved surface Area = πrL = 5/1 * 13/1 * π = 65πcm2THIS WEEK's
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