The movie that is being replayed 6 times takes 1.5 x 6 = <<6*1.5=9>>9 hours.
The advertisements before the start of the movie take 20 x 6 = <<20*6=120>>120 minutes in all.
One hundred twenty minutes is equal to 120/60 = <<120/60=2>>2 hours.
Thus, the movie theater operates for 9 + 2 = <<9+2=11>>11 hours each day.
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