# Double-track line

A 160 m long passenger train runs on a double-track line in one direction at a constant speed of 54 km/h, and a 240 m long express train in the opposite direction.

a) How fast is the express train if passing the passenger train driver for 6 s?

b) How long does the passenger train pass the express train driver?

a) How fast is the express train if passing the passenger train driver for 6 s?

b) How long does the passenger train pass the express train driver?

### Correct answer:

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