# A red car and a green car, identical except

In the figure, a red car and a green car, identical except for the color, move toward each other in adjacent lanes and parallel to an x axis. At time $t=0$, the red car is at $x_r=0$ and the green car is at $x_g=220 m$. If the red car has a constant velocity of 20 km/h, the cars pass each other at $x=44.5 m$, and if it has a constant velocity of 40 km/h, they pass each other at $x=76.6 m$.What are (a) the initial velocity and (b) the constant acceleration of the green car?