There's no set answer to that question, as it would depend on how fast you're going. And that would depend on quite a lot of things, how fit you are, how hard you're trying, what kind of bike you're riding, uphill/downhill, headwind/tailwind, if you're carrying any gear, if it's a short race or a part of a longer ride, road/offroad....
Under most circumstances it'd probably take about one hour, although a real pro under ideal conditions could pull it off in considerably less on level ground.
A: 9 hours.
4 hours 9 minutes.
9-10 Hours
At an average 60 mph: 9 minutes
depends how fast you go
9 and half hours
18 minutes
9
About 9 minutes.
9 minutes if your a lad.
9 hours
9 HOurs