20 Maybe?
The average speed of the world record in the 100m dash is around 37.58 km/h (23.35 mph).
Kristy Coventry from Zimbabwe rewrote the world record for the women's 100m breastroke, and the record is 58.77 seconds.
10.49s
47sec
Asafa Powell set the 100m World Record three times during his career.
Steffen Deibler holds the world record in the 50m butterfly. http://en.wikipedia.org/wiki/List_of_world_records_in_swimming
9.6 secones
Florence Griffiths-Joyner
9.58 sec
Usain Bolt broke the 100m world record 3 times and the 200m world record 2 times. He first broke the 100m record May 31, 2008. He rebroke it August 16, 2008 and August 16, 2009. He first broke the 200m world record August 20, 2008. He rebroke the 200m world record August 20, 2009.
20:58 ...Usain Bolt
The current World Record for the men's 100M Sprint is 9.58 seconds by Usain Bolt of Jamaica. The current World Record for the women's 100M Sprint is 10.49 Seconds by Florence Griffith-Joyner of the USA.