Question

The tip of a 12-inch wiper blade wipes a path that is 30 inches long. What is the angle of rotation of the blade in radians to the nearest tenth? 0.4 radians 1.3 radians 2.5 radians 5.0 radians

Answer 1

c 2.5 radians

Explanation:

Answer 2

Circumference of a circle is given by:
C=theta/360 πd
given that:
d=24 inches
C=30 inches
therefore;
30=Θ/360*π*24
thus;
30=0.21Θ
thus;
Θ=143.24
converting this into radians we proceed as follows;
radians=(π/180)*degrees
=(π/180)*143.24
=2.5 radians

The answer is 2.5 radians