The curved surface area of a cylinder 5cm high ... - JAMB Mathematics 2017 Question
The curved surface area of a cylinder 5cm high is 110cm2. Find the radius of its base
π = \(\frac{22}{7}\)
π = \(\frac{22}{7}\)
A
2.6cm
B
3.5cm
C
3.6cm
D
7.0cm
correct option: b
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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