Distance, speed and time
Average speed 17Boats in a current 17🔒Catching up and overtaking 18🔒Changing speed and arrival time 17🔒Chases measured in steps 8🔒Closest approach of two movers 15🔒Fuel consumption and distance 12🔒Laps on a circular track 16🔒Meeting points and shuttles 16🔒Milestones and distances 6🔒Ratios of speeds and times 18🔒Relative motion on roads 14🔒Runners on a track 10🔒Total distance walked 8🔒Trains: length, speed and intervals 18🔒Travel time and speed 16🔒Two travellers meeting 18🔒