Florence Griffith-Joyner (Flo Jo) set the women’s World Record in the 100 m dash in 1988 with a time of 10.49 s. What was her average speed in miles/hr?

Question

Florence Griffith-Joyner (Flo Jo) set the women’s World Record in the 100 m dash in 1988 with a time of 10.49 s. What was her average speed in miles/hr?

Answer 1

100 m / 10.49 sec                             convert meters to miles (1 m = 0.000621371 mi)

0.0621371 mi / 10.49 sec                 convert seconds to hours (1 sec = 1/3600 hour

0.0621371 mi / 0.00291388889 hr  divide

21.3244576 mi / hr