70\(^o\)
84\(^o\)
96\(^o\)
156\(^o\)
Correct answer is B
L = \(\frac{\theta}{360} \times 2 \pi r\)
22 = \(\frac{theta}{360} \times 2 \times \frac{22}{7} \times 15\)
\(\theta = \frac{22 \times 360 \times 7}{2 \times 22 \times 15}\)
\(\theta\) = 84\(^o\)