Depends on a lot of things, how fit you are, how hard you're trying, where you're riding, what bike you're using and so on.
On easily ridden roads, a pack of racers could do it in about 4 hours. Riding solo, I'd need about 6. Some may need more.
There's really no telling as it's dependent on so many conditions, road, weather, fitness, bicycle type and quality. I could probably do it in 3 hours in favorable conditions while other may require 5 hours. A half-decent racer should get it done in 2.5 hours.
K is short for kilometres, now can you work it out?
Amateur: about 2.5-3hrs.
About 2.5 hours
About 2 hours
I presume you mean how long will it take for a 12 miles bike ride. It depends on how fast you can bike, if it's uphill or downhill. The average is between 8-13 mph for most people to bike on a 10-speed on the whole. By that measurement, it could take 50-90 minutes or so on the average.
It depends on how fast you can ride a bike!
A bike Trail is up to 1-10 miles long.
20 min: 60 mph = 1 mpmin
Three hours (30/10 = 3).
140 miles long!!!!
2 hrs and 39 minutes
A little under 2 minutes.
it obviously depends how fast you can ride a bike and how long you can go without stopping
3 hours
3.5 hours.
0.2 hours