Question 34

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waecmaths question: 

An arc of a circle subtends an angle of 60o at the centre. If the radius of the circle 3cm, find in terms of π, the length of the arc

Option A: 

π cm

Option B: 

2π cm

Option C: 

3π cm

Option D: 

6π cm

waecmaths solution: 

$\begin{align}  & length\text{ }of\text{ }the\text{ }arc=\frac{\theta }{360}\times 2\pi r \\ & l=\frac{{{60}^{\circ }}}{{{360}^{\circ }}}\times 2\times \pi \times 3=\pi cm \\\end{align}$

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