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
10 secounds
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.
Top speed for an electric razor scooter is around 10mph.
They would both be about the same for speed.
The world speed record for a thrown handball is 131 km/h (81 mph) achieved by Mikkel Hansen of Denmark in 2019.