600/75 = 8 so the train in all had to come across 7 stations by the last 8th station it covered the 600 kilometers so no halting time. 7stations * 3mins = 21 mins THe total time the train halted 75 kms it covers in 45 mins , which is the journey for 1 station so in all 45 *8 = 360 mins In all time 3...