Mathematics
WAEC 1998
Find the curved surface area of a cone of radius 3cm and slant height 7cm (\(take \pi = \frac{22}{7}\)
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A.
\(22cm^2\)
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B.
\(44cm^2\)
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C.
\(66cm^2\)
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D.
\(132cm^2\)
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E.
\(198cm^2\)
Correct Answer: Option C
Explanation
Curved surface area of a cone \(= \pi rt\\
\frac{22}{7}\times 3\times 7 = 66cm^2\)
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