Mathematics
JAMB 2017
The curved surface area of a cylinder 5cm high is 110cm
2. Find the radius of its base
π = \(\frac{22}{7}\)
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A.
2.6cm
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B.
3.5cm
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C.
3.6cm
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D.
7.0cm
Correct Answer: Option B
Explanation
Curved surface area of cylinder = 2πrh
110 = 2 × \(\frac{22}{7}\) × r × 5
r = \(\frac{110 \times 7}{44 \times 5}\)
= 3.5cm
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