XOY is a real sector of a circle center O of radius 3.5cm which subtends an angle of 144o at the center. Calculate, in term of \(\pi\), the area of the sector
a
1.4\(\pi\)cm2
b
2.8\(\pi\)cm2
c
4.9\(\pi\)cm2
d
9.8\(\pi\)cm2
Explanation
Correct Option
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