Problem 362
The Olympic Race. At the 1988 Summer Olympics in Seoul, South Korea, Florence Griffith-Joyner ran the 100-meter dash in 10.49 seconds (a world record). What was her speed in miles per hour? (1 meter is approximately 39.37 inches.)
Solution
speed is 
=9.533 meter/sec
1 meter = 
miles
So 9.533 m/s = 9.533*()*3600 miles/hour
= 
=21.32 miles/hour