100 mph means it takes 3 minutes to cover 5 miles, or 36 minutes to cover 60 miles. 60 mph covers that in 60 minutes (duh!). So, assuming the time/distance it takes both trains to get up to speed and to stop from that speed to be negligible, train A takes 60+10+10, 80 minutes, while train B takes 36+20+25, 81 minutes. Don’t sweat the extra minute, sheep. It may mean you have one more minute to remain alive.
100 mph means it takes 3 minutes to cover 5 miles, or 36 minutes to cover 60 miles. 60 mph covers that in 60 minutes (duh!). So, assuming the time/distance it takes both trains to get up to speed and to stop from that speed to be negligible, train A takes 60+10+10, 80 minutes, while train B takes 36+20+25, 81 minutes. Don’t sweat the extra minute, sheep. It may mean you have one more minute to remain alive.