Question 15


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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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