Suppose a Wheel Is Initially Rotating at 10

Multiple Choice

Suppose a wheel is initially rotating at 10.0 rad/s while undergoing constant angular acceleration reaching a speed of 30.0 rad/s after 20.0 seconds have elapsed.How long after the initial time has the wheel undergone half of the angular displacement that it will have gone through during the entire 20.0 second interval?

A) 10.0 s
B) 12.4 s
C) 14.2 s
D) 15.0 s