TWO LOCOMOTIVES APPROACH EACH OTHER ON PARALLEL TRACKS. EACH HAS A SPEED OF 95KM/H WITH RESPECT TO THE GROUNG. IF THEY ARE INITIALLY 8.5KM APART, HOW LONG WILL IT BE BEFORE THEY REACH EACH OTHER?

Answer 1

The distance between them decreases at a rate of 190 km/h. The time required to reduce the spacing from 8.5 km to 0 is:
8.5 km/(190 km/h)= 0.04474 h = 2.68 minutes = 2 minutes and 41 seconds