Question 360570
How long does it take to travel from point A to point B, a distance of 25 miles
traveling at 70 miles per hour: 25/70 = 5/14 hr = (5/14)60 min = 21.43 minutes  

and traveling the same distance at 90 miles: (25/90)60 = 16 2/3 minutes
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Cheers,
Stan H.