An arc of length 22cm subtends an angle of θ at the center of the circle. What is the value of θ if the radius of the circle is 15cm?[Take π = 22/7]

A. 70o (0 means degree)
B. 84o
C. 96o
D. 156o
E. 168o

Correct Answer: Option B

B. 84o

2πr = 2 x 3.142 x 15 = 94.28cm; 94.28 = 360o
∴ 22cm =
360o/94.28 x 22

= 84o