SOLUTION: 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??

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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) About Me  (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 70miles%2F70mph
For 80mph, do the same thing -- just with the different value
70miles%2F80mph=.875 hours
Multiply the fraction by 60 (60 minutes in an hour) to find that it will take him 52.5 minutes