On a farm, on average every 6 cows produce 108 liters of milk per week. In five weeks the cows produced 2160 liters of milk. How many cows are on the farm?
Per week, one cow produces 108 liters / 6 cows = <<108/6=18>>18 liters/cow.
The cows produced 2160 liters of milk over 5 weeks. So we have 2160 liters / 18 liters/cow = <<2160/18=120>>120 cows.
Further, we have to divide 120 cows / 5 weeks = <<120/5=24>>24 cows.
#### 24