Question

The tip of an 11-inch wiper blade wipes a path that is 31 inches long. What is the angle of rotation of the blade in radians to the nearest tenth?

Answer 1

2.8 radians is the answer.

Answer 2

length of arc = Cr where C = angle of rotation and r = radius

31 = C*11

C = 31/11 = 2.8 radians to nearest tenth