Q:

How fast is the worlds fastest runner in mph

Answer

Usain Bolt ran the 2008 Olympic final in 9.69 seconds. That's an average of 23.08 mph. Thanks, ChaCha!

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Usain Bolt ran the 2008 Olympic final in 9.69 seconds. That's an average of 23.08 mph. Thanks, ChaCha!

Mar 28 2009, 01:30am | Source: Usain Bolt 100m 10 meter Splits and Speed Endurance | SpeedEndurance.com | speedendurance.com