A track star ran exactly 400 meters in 45.23 seconds.What was the average speed in miles per hour?
A)19.8 miles/h
B)19.78 miles/h
C)8.844 miles/h
D)0.3297 miles/h
E)8.84 miles/h

Question

Quizplus · Accepted Answer

1 meter = 0.000621371 miles

400 meters = 0.248548 miles

45.23 seconds = 0.0125639 hours

Average speed = Distance / Time

= 0.248548 miles / 0.0125639 hours

= 19.78 miles/h (rounded to two decimal places)

A Track Star Ran Exactly 400 Meters in 45