If a runner runs the 100 meter dash in 9.58 seconds how fast is he running in MPH?
About 24 miles per hour.
The men's world record in the 400 meter dash is 43.18 seconds. The men's world record in the 400 meter hurdles is 46.78 seconds. This is a difference of 3.60 seconds. The women's world record in the 400 meter dash is 47.60 seconds. The women's world record in the 400 meter hurdles is 52.34 seconds. This is a difference of 4.74 seconds.
There is no indoor 100 meter dash. There is an outdoor 100 meter dash, for which American Florence Griffith Joyner holds the women's world record at 10.49 seconds. Usain Bolt of Jamaica is the men's record holder at 9.58 seconds. There are only a 50 meter dash and a 60 meter dash in indoor track. The women's records at 50 and 60 meters are both held by Irina Privalova at 5.96 and 6.92 seconds, respectively…