Find the radius of a circle in which an arc of length 44cm subtends angle 200^\circ at the centre of the circle. [Take \pi = 22/7]
A
3.9cm
B
12.6cm
C
25.2cm
D
38.4cm
E
124.5cm
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
44 = 200/360 x 2 x 22/7 x r
r = 360 x 7 x 44/200 x 2 x 22
= 12.6cm
Source: Myschool Past Questions Archive (Record #23870)