As both the World Land Speed Record and the World Water Speed Record are under constant challenge you question cannot be given a simple answer.
The average speed of the world record in the 100m dash is around 37.58 km/h (23.35 mph).
The world record for speed stacking a set of 6 cups is 1.847 seconds, achieved by Steven Purugganan in 2018.
10mph
73 mph
the highest speed rate was 11 mph, but that was a world record
It's Thrust SSC, the holder of the world land speed record of 763 mph
The French TGV.
The world speed record for a thrown handball is 131 km/h (81 mph) achieved by Mikkel Hansen of Denmark in 2019.
62 mph
writer Barbara Blackburn
It was Henry Ford.