XOY is a real sector of a circle center O of radius 3.5cm which subtends an angle of 144

^{o}at the center. Calculate, in term of ϖ, the area of the sector-
**A.**

1.4ϖcm^{2} -
**B.**

2.8ϖcm^{2} -
**C.**

4.9ϖcm^{2} -
**D.**

9.8ϖcm^{2}

##### Correct Answer: Option C

##### Explanation

Area of a sector (=frac{theta}{360}times pi r^2\

left(frac{144}{360}times pi times frac{3.5}{1} times 3.5right)cm^2 = 4.9pi cm^2)