If a train is 1 mile long and is traveling at 1 mile per minute how long will it take the train to go through a tunnel that is 1 mile?

Well, isn't that a lovely little puzzle! If the train is 1 mile long and it's traveling at 1 mile per minute, it will take a total of 2 minutes for the train to completely pass through the 1-mile tunnel. Just imagine the train chugging along steadily, enjoying the journey through the tunnel, and coming out the other side with a happy little toot of its whistle.