Math Problem #1

[Willow Oak]

If I were you though, I'd recommend a faster train.

I intended to say "miles per second;" nonetheless, the numerical part of the answer would be the same.

And the winner is:

2 hours for the last car to leave the tunnel.

Congratulations! Job well done! It would take a 1-mile long train moving at the already rate of 1 mile per hour, exactly 1 hour to completely move into a tunnel that is 1 mile long. Then another hour would be required for that train to completely exit the tunnel.

The correct answer is 2 hours!

I would never ride such a train. I am too impatient.