Racecar
 

Hi,

this one is pretty easy, but anyways.

A racecar drives a 2 kilometers long track and takes 4 minutes to complete it (yeah I know that is slow, consider he was driving backwards or something ;) ) At what speed does he have to take a second lap, to get an average speed of 60 km/h for both laps?

Have fun, Matthes

That's [size=18]IMPOSSIBLE[/size]!!!!!!
Two laps is 4 km.So it must finish it in 4 min to get an average speed at 60 km/h.But its first lap has already taken the 4 min!!!Hence it has no time to run the second lap!

And that is the correct answer. :D