Damn two trains

Algebra Level 3

The difference between the speeds of two trains is \(10\text{ km/hr}\). The slower train begins journey from a station and when it covers \(160\text{ km}\), the faster train begins journey from the same station on a parallel line and reaches the destination \(1\text{ hour}\) before the slower one. But if the faster train begins journey after covering \(120\text{ km}\) by the slower one, then it can reaches the destination \(2\text{ hours}\) before the slower one. What is the speed (in \(\text{ km/hr}\)) of the faster train ?

Bonus question: If you can solve it, please share it with distance between the stations!

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