How long could a Zombie Apocalypse seriously last?

[AstroGamer]

mii-gamer said:

Netyaroze said:
If from one day to the other 90% of the human population would become Zombies I guess within 1 week all Zombies would be dead.

I can kill 9 Zombies in a couple of hours so can everyone else. If people need 6 days to decide to kill the Zombies they will die the next day.

For it to be a challenge the ratio must be 10000 Zombies vs one Human. This will require a daily fight like we see in Walking Dead.

We gotz no guns in australia. So are we fucked? 

Best zombie killing weapon i have is a cricket bat, and if you have played zombiu they are'nt very effective. I can use knives but i rather keep my distance.

got any advice for me, master?

Dig a large ditch. Take a rock and attach a loud noisemaking device. Throw rock over ditch. Push a large boulder or burn them with gasoline.

I feel that if the problem is normal zombies, they would die out by 6 months. "Zombies" like in Resident Evil would take longer consider that the "Zombies" are not fully dead. Demonic zombies would eventually overrun us