Question on: JAMB Mathematics - 2024
The curved surface area of a cylinder 5 cm high is 110 cm². Find the radius of its base.
Given: \(\pi = \frac{22}{7}\)
A
2.6cm
B
3.5cm
C
3.6cm
D
7.0cm
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Correct Option: B
Formula for curved surface area:
\(CSA = 2\pi r h\)
Given \(CSA = 110\), \(h = 5\):
\(110 = 2 \times \frac{22}{7} \times r \times 5\)
\(110 = \frac{220}{7} r\)
\(r = \frac{110 \times 7}{220} = 3.5\) cm
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