Max completed a 10 mile run in 1 hour 20 minutes. Which dimensional analysis would you use to find her average speed in miles per hour?
10 miles1.2 hours×24 hours1 day
10 miles1.2 hours×24 hours1 day
10 miles120minutes×60 minutes1 hour
10 miles120minutes×60 minutes1 hour
10 miles80minutes×60 minutes1 hour
The correct dimensional analysis would be:
10 miles1.2 hours × 1 hour60 minutes
This simplifies to:
10 miles0.02 hours
To find the average speed in miles per hour, we divide the distance by the time:
10 miles0.02 hours = 500 miles per hour