two cars, A and B are approaching each other in adjacent highway lanes. At a given instant in time, A is at location P and B is at location Q which...

two cars, A and B are approaching each other in adjacent highway lanes. At a given instant in time, A is at location P and B is at location Q which are 1 km apart. At this same time, the speed of A is 108 km/h and the speed of B is 63 km/h. After 40 seconds has passed, A passes through location Q; and , 2 seconds later, B passes through location P. Both cars undergo constant acceleration. Determine the time when the two cars pass each other on the highway