A college runner set a school record of 3:59.37 in the mile run.Assuming that the distance was measured accurately to five significant figures,what was the runner's average speed in kilometers per hour?

Question

Quizplus · Accepted Answer

To find the runner's average speed in kilometers per hour, we need to convert the distance from miles to kilometers and the time from minutes to hours.

Distance in kilometers:
1 mile = 1.609344 kilometers
So, distance = 1.609344 km

Time in hours:
3 minutes and 59.37 seconds = (3 + 59.37/60) minutes = 3.9895 minutes
1 minute = 60 seconds
So, time = 3.9895/60 hours = 0.0665 hours

Average speed = distance/time
= (1.609344/0.0665) km/hr
= 24.203 km/hr

Therefore, the best choice is C.

A College Runner Set a School Record of 3:59