How long would it take to cross country ski 17.7 kilometers?

To professional male runners in the world - it takes something like 69-72 minutes (1:09-1:12 hours); and to professional female runners it takes like 77-83 mintes (1:17-1:23 hours).

If you are arunner that run only for fun, every result under 2 hours is good.

If you are a -little-bit competitive runner, a result of under 1:30 hours (for male) of under 1:50 hours (for female) is good.

and if you are an olympic runner - ask your coach about it, why do you ask me!?