Math Problem #1

[Karen]

2 hours for the last car to leave the tunnel.

I agree, and blue, if the train was starting from a dead stop, there's no way we could know, as we'd need to know the rate the train could accelerate, or even more difficult, the number of engines, their pulling power and the weight of the cars.

The question said it was traveling at the rate of 1 mph - so it was already moving.

[Lady's Human]

By the way, keep 'em coming, I enjoy logic problems,