clear 3 hours
According to raileurope.com a train from Paris to Madrid takes approximately 13 hours.
About 4 Hours.
The quickest train from Brussels to Paris usually takes not very long at all. The quickest train from Brussels to Paris usually takes about one hour and fifteen minutes.
1 hour
7 to 8 hours.
About 3 hours
This depends on if you take a bullet train or regular train. Regular train is actually about 13 hours. 5 hours
For a day trip for Paris, you could go to Lille (one hour using the high speed train) or historical towns 150/200 kms from Paris: Bourges, Reims, Amiens (all three claim 2,000 years of history and World Heritage sites). Even closer are Chartres, Fontainebleau and Versailles.
You take the train from Paris-Saint-Lazare
== == Less than an hour on the RER train.
It depends how much money you have .
About 2.5 hours