A Light Truck with Manual Transmission Has a Circular Brake

A light truck with manual transmission has a circular brake drum with a diameter of 317 millimeters. Each brake pad, which presses against the drum, is 308 millimeters long. What central angle is subtended by one of the brake pads? Write your answer in both radians and in degrees. ​a = 308  millimeters, b = 317  millimeters ​

A) 2.14 radians, 113°
B) 2.04 radians, 110°
C) 1.94 radians, 111°
D) 2.34 radians, 107°
E) 1.64 radians, 114°