9 hours 42 minutes.
1 hour 29.5 minutes.
100 miles at 100 mph would take 1 hour
It would take 2 hours to go 100 miles at 50 miles per hour.
It would take 12 minutes to drive 20 miles at 100 mph.
(100 miles)/[(40 miles)/hour] = 2.5 hours
1.82 hours
Two hours.
It would take: 1 hour at 100 mph or 2 hours at 50 mph
It would take 15 minutes to drive 25 miles at 100 mph.
100 hours.
42 minutes
100/80 = 1.25 hours
100 miles / 75 miles per hour = 1.33333 hours = 80 minutes