Question on: JAMB Mathematics - 2024
An arc subtends an angle of 30° at the centre of a circle radius 12cm. Calculate the length of the arc.
A
6\(\pi\)cm
B
2\(\pi\)cm
C
3\(\pi\)cm
D
9\(\pi\)cm
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Correct Option: B
Arc length formula:
\[ \, L = \frac{\theta}{360°} \times 2\pi r \, \]
Given θ = 30°, r = 12 cm
Substitute:
\[ L = \frac{30}{360} \times 24\pi = 2\pi \]
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