@1e2d0806: To solve this math problem, we can use the formula Distance = Speed * Time. Let's assume that the first train travels for t hours before the second train catches up to it.

For the first train:

Distance = Speed * Time

Distance = 60 mph * t

For the second train:

Distance = Speed * Time

Distance = 80 mph * (t - 1) (since the second train leaves an hour later)

Since both trains are traveling the same distance when the second train catches up, we can set the two equations equal to each other:

60t = 80(t - 1)

Now we can solve for t to find the time when the second train catches up to the first.