Question 29


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Jambmaths question: 

A circular arc subtends angles 150o at the centre of a circle of radius 12cm. Calculate the area of the sector of the arc.

Option A: 

30$\pi $cm2

Option B: 

60$\pi $cm2

Option C: 

120$\pi $cm2

Option D: 

150$\pi $cm2

Jamb Maths Solution: 

$\text{Area of sector }=\frac{\theta }{{{360}^{\circ }}}\times \pi {{r}^{2}}=\frac{{{150}^{\circ }}}{{{360}^{\circ }}}\times \pi ({{12}^{2}})=\frac{150}{360}\times 144\pi =60\pi c{{m}^{2}}$ 

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