Posts by Howie242

    The trains are closing with one and other at 160+120=280km/h, the distance between them is 140km so they will hit each other in 30 minutes (140km/280km/h=0.5h) In 30 minutes the supervisor can run 7km (14km/h*0.5h=7km) 6.3km is less than 7km so he gets there on time to stop the crash.