If a monkey swings 1.2 meters a second then a monkey can swing 1.2 meters/second * 60 seconds/minute = <<1.2*60=72>>72 meters in a minute.
If a monkey swings 72 meters in a minute then a monkey can swing 72 meters/min * 30 minutes = <<72*30=2160>>2,160 meters in 30 minutes
#### 2160