a train leaves the station at 10.pm and travels due north at a speed of 100km/h. another train has been heading due west at 120 km/h and reaches the same station at 11.pm at what time were the trains closest together?

a train leaves the station at 10.pm and travels due north at a speed of 100km/h. another train has been heading due west at 120 km/h and reaches the same station at 11.pm at what time were the trains closest together?