He then went to see the oranges being harvested. He found out that the harvest will go on for 4 days. How many sacks do they harvest per day if they harvested a total of 48 sacks of oranges?
1. He went to see the oranges being harvested. 
2. He found out that the harvest will go on for 4 days. 
3. How many sacks do they harvest per day if they harvested a total of 48 sacks of oranges?

We are trying to find out how many sacks of oranges are harvested per day. We are given that the total number of sacks harvested is 48, and that the harvest will go on for 4 days. 

We can set up the equation 48 = 4x, where x is the number of sacks of oranges harvested per day. 

We can solve for x by dividing both sides of the equation by 4: 

48/4 = 4x/4

12 = x

This means that the oranges are being harvested at a rate of 12 sacks per day.