Speed in mph for 6.13 sec 100meter dash?

36.49mph. 328.08 feet (in 100 meters) / 6.13 seconds/100m = 53.52 ft/sec 53.52ft/sec * 3,600 seconds (in an hour) = 192,675.75 ft/hr 192,675.75 / 5,280 feet (in a mile) = The (as of a few days ago) world's fastest cheetah was running 36.49 mph - which I was surprised by - I thought it would be going a lot faster than that! Comparitively, Usain Bolt was travelling an average of 23.35 mph for his latest world record of 9.58 seconds for 100m. Keep in mind that cheetah versus human accelerations impact average speed calculations.