Jambmaths question:
Find the length of arc which subtend an angle an angle of 60oat the centre of a circle whose radius 12cm
Option A:
6π cm
Option B:
4 π cm
Option C:
3 π cm
Option D:
2 π cm
Jamb Maths Solution:
$\begin{align} & \text{length of arc}=\frac{\theta }{360}\times 2\pi r \\ & l=\frac{60}{360}\times 2\pi (12) \\ & l=4\pi cm \\\end{align}$
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