I think @Dilnashi received unnecessary negative feedback, perhaps as she needed to elaborate a bit but heres how i can build on that. First, as Daffy Duck nailed it really, its about smart working with SEO.
I dont think you can earn $10 a day from just one article, but certainly I can see it from one article a day, in theory. Perhaps best achieved with a handful but you are talking about a load of SEO link building.
In practice, its not feasible to get $10 a day without writing a horde of high quality articles, loved by the masses, and lots of clicks (not just adsense but linked hubs, and spreading hub traffic to others). I hope to find out at some point.
For example, on why its not feasible to say just one article, on-page SEO plays a big part. So, people who link up their minions of hubs have good crawling potential from Google.