Hello, imthatgirl!

2) A train leaves the station at 10:00 and travels due north at 100km/h.

Another train has been heading due west at 120km/h and reaches the station at 11:00.

At what time were the 2 trains closest?

Train #1 leaving the station at 100 km/hr.

In hours, it is at

Train #2 heads west at 120 km/hr and reaches at 11:00.

. . Hence, at 10:00, it was at , 120 km east of

In hours, it is at Code:

A *
| *
| *
100t | *
| *
| *
* - - - - - * - - - - - *
S 120-120t B 120t P
: - - - - 120 - - - - :

The distance is: .

Hence: .

Then: .

Therefore, the trains were the closest at about