how fast could usain bolt run the mile
1 At this speed, Usain Bolt would travel 1 mile in 155 seconds. 2  1 hour is $60\times60=3600$ seconds, so he traveled 1 mile in $155\div3600=0.043056$ hours. 3  At this speed, Usain Bolt would travel 1 mile in 0.043056 hours. 4  This means he would travel $1\div 0.043056 \approx 23.2$ miles in 1 hour.