How long does it take to change 4 tires?

I have to take my car in to get all 4 tires changed.. how long does it REALLY take???How long does it take to change 4 tires?Mounting and balancing four new tires in a busy shop shouldn't take more than an hour.How long does it take to change 4 tires?roughly 30 minutesHow long does it take to change 4 tires?ABOUT 30 MIN,How long does it take to change 4 tires?it depends on the person doing the work