Via the Blue Mountains and Bathurst it takes about 4-5 hours but it can be more due to sydney traffic and mountains weather and/or traffic incidents.
Sydney to Armidale is 563km so it would take around 7 hours to drive, depending on traffic and conditions.
18hours
About twenty hours.
Approximately 9 hours and 36 minutes, depending on traffic, 736km :) See below link for direction
23 hours is the approximate time it will take to get from Sydney, to Tonga.
4973km or 2 days and ten hours non stop to drive.
I dont know the exact kilometres but from North Sydney to Sydney is about a 15 minute drive.
nine hours
You cannot drive from Sydney to Papua New Guinea. The northern tip of Australia lies 150km from the southern coast of Papua New Guinea.
12-14 hours
14 and a half hours.
About 17 hours.