For this kind of problems, divide the distance travelled by the speed. If the distance is in miles, and the speed in miles per hour, the time will be in hours.
1 hour.
One hour.
At 80 miles per hour, one hour. At sixty miles per hour, 80 minutes.
It would take 2 hours to go 100 miles at 50 miles per hour.
A really long time; about six months at 55 miles per hour.
1 hour 12 minutes.
At 65 miles per hour, 1 hour.
1 hour 45 minutes.
1 hour 28 minutes.
1 hour 30 minutes.
110 miles/65 miles/hour = 1.692 hours
16