Question

Jamaica's Usain Bolt is the fastest man in the world, holding the world record for the 100 m sprint of 9.58 s. Given that 1 km= .621 mi and 3600 s= 1 hr, what was his average speed in miles per hour for this distance?

Answer 1

Usain Bolt's average speed during his 100 m world record sprint was approximately 23.4 miles per hour, after converting the distance to miles and the time to hours.

Step-by-step explanation:

The question asks for Usain Bolt's average speed in miles per hour during his world record 100 m sprint where he finished the distance in 9.58 seconds. To find the average speed, we can use the given conversion rates: 1 km = 0.621 mi and 3600 s = 1 hr. First, convert 100 m to kilometers: 100 m = 0.1 km. Then change kilometers to miles: 0.1 km × 0.621 = 0.0621 mi. Finally, convert the time to hours: 9.58 s = 9.58 / 3600 hr. To find the speed in miles per hour, divide the distance by the time: 0.0621 mi / (9.58 / 3600) hr, which equals approximately 23.4 mph. This confirms that Usain Bolt's average running rate during the 100 m world record was 23.4 mph, highlighting his remarkable speed as a sprinter.