Question 895461: 2 cars travel 70 mi each one is going 70 mph the other 80 mph how long does it take the car going 80 mph?? Answer by JulietG(1812) (Show Source):
You can put this solution on YOUR website!
How long will it take the car going 70mph to travel 70 miles? 1 hour, right? Your brain mentally did that automatically, dividing
For 80mph, do the same thing -- just with the different value =.875 hours
Multiply the fraction by 60 (60 minutes in an hour) to find that it will take him 52.5 minutes