1:18.739 Source: http://www.bbc.co.uk/northamptonshire/content/articles/2006/06/07/silverstone_milestones_feature.shtml
Oh, dude, 20 kilometers is like around 12.4 miles in total. So, if you're at a standard track where one lap is 400 meters, you'd need to do like 50 laps to hit that 20 km mark. But hey, who's counting when you're just running in circles, am I right?
About 3 hours
Silverstone is a racing circuit in England where the british grand prix is held every year in the formula one racing calendar. The circuit is 5.141 km long and has a total of 17 turns.
The lap record for a F1 is 1:18.739 set by Michael Schumacher in 2004 en route to a victory in his Ferrari chassis.
Ben Silverstone's birth name is Benjamin Maurice Silverstone.
Phillip Silverstone was born in 1952.
Marilyn Silverstone was born in 1929.
Marilyn Silverstone died in 1999.
SilverStone Technology was created in 2003.
Gedaliah Silverstone died in 1944.
Gedaliah Silverstone was born in 1871.