Depending on how fast you're going, 15 miles would take one hour if you're going 15 miles per hour. If you're going 10 mph, 15 miles would take 1 1/2 hours. If you're going 20 mph, 15 miles would take 45 minutes.
That depends on your speed.
3.5 hours.
About 20 minutes.
Since a stationary bike doesn't move, there's no way it can travel 20 miles. Now, if you're asking how long it would take to ride twenty miles on a bicycle, it depends on speed, wind, and other factors. Typically a bike maximum speed is about 20 miles per hour. So it would take about an hour to ride 20 miles on a REGULAR moving bicycle.
20 min: 60 mph = 1 mpmin
It will take one hour to travel 30 miles.
3 hours
The number of hours it will take to travel 308 miles is(308)/(your average speed, in miles per hour)
Three hours (30/10 = 3).
At what speed?
The time it takes to bike 2 miles depends on your speed. On average, it takes about 10-15 minutes to bike 2 miles at a moderate pace.
3.5 hours