It depends on what is meant by "going 60": 60 miles an hour, or 60 feet per second, or 60 knots or some other measure.
About 47 minutes.
11.3 mi / 55 mph x 60 minutes = 12.3 minutes
About 10 minutes 55 seconds.
55 minutes = 11/12 hours. 19 miles per 11/12 hours = 20.7272 mph or 20+1/8 mph
8 hours 55 minutes.
81.82 miles per hour.
About 12 minutes
130.9 minutes.
He can run 9.6 miles in 88 minutes.
55
55 minutes at 60 mph
6 hours, 28 minutes, 21.82 seconds