Answer
The angular displacement of each wheel is $267rad$.
Work Step by Step
We have $\omega=+74.5rad/s$, $\alpha=+6.7rad/s^2$ and $t=4.5s$
The initial velocity of each wheel is $$\omega_0=\omega-\alpha t=+44.35rad/s$$
The angular displacement can be calculated by $$\theta=\omega_0t+\frac{1}{2}\alpha t^2=267rad$$
