College Physics
posted by Peter .
A red car and a green car, identical except for color, move toward each other in adjacent lanes and parallel to an xaxis. At time t=0, the red car is at x sub r = 0 and the green car is at x sub g = 220m. If the red car has a constant velocity of 20km/h, the cars pass each other at x = 44.5m, and if it has a constant velocity of 40 km/h, they pass each other at x=76.6m. What are (a) the initial velocity and (b) the constant acceleration of the green car?

How can the cars pass each other at 44.5 m and at 76.6m?

They start 220 m apart and move toward each other. The point where they pass depends upon the speed of the red car, for which two values are assumed.
I answered this question earlier today