The winner of the men's 1500-meter speed skating event at a recent Winter Olympics had a time of 1:45.57.Assuming that the distance was measured accurately to five significant figures,what was the skater's average speed in miles per hour?
A)31.790 mi/hr
B)38.418 mi/hr
C)51.151 mi/hr
D)61.826 mi/hr

Question

Quizplus · Accepted Answer

To find the average speed in miles per hour, first convert the distance from meters to miles (1500 meters = 0.932056788 miles, using the conversion 1 mile = 1609.34 meters). Then, convert the time from minutes and seconds to hours (1 minute and 45.57 seconds = 1.7595 hours, using the conversion 1 hour = 3600 seconds). The average speed is then calculated as distance/time = 0.932056788 miles / 1.7595 hours = 0.5297 miles/minute. To convert this to miles per hour, multiply by 60 (minutes in an hour), giving an average speed of approximately 31.790 miles per hour.

The Winner of the Men's 1500-Meter Speed Skating Event at a Recent