Mrs. Matilde has a phobia of the tunnels. Unfortunately, today he has to take a train consisting of 10 wagons from the station of his town where a long tunnel begins just at the exit of the station.
In which car should you travel to stay as short as possible inside the tunnel?
The train, when starting, gradually increases its speed and since the tunnel is just outside the station, the first cars will enter it when it still runs at low speed so it will take longer to cross it while the last car will It crosses when the train has already developed greater speed and therefore is the one that crosses it in less time. So Mrs. Matilde must go up in the last car if you want to spend as little time as possible inside the tunnel.