>>986627Are you talking airplane or helicopter?
Also depends on where your home airport is in relation to practice area. If you're out in the middle of nowhere, it takes less time. If you're out of a busy airport you spend more time on the ground and getting to and from practice area.
10 to 15 hours is pretty average for slow convenient airspace.
Flying out of class C airport might take you 20.
Also, if you're in the airplane four times a week it's going to take you fewer hours that if you're in the airplane twice a week.
Also, if your instructor is new, he may be nervous to cut you loose too soon and as a result, hold your hand too much.
There's also student aptitude to consider. This is often not a function of intelligence or piloting prowess.
You'll learn faster if you sleep 8 hours a night, eat well, and exercise. Wake up early on days you have a morning lesson so you're awake by the time you get to the airport. Etc.