Explanation:
If three restaurant workers spend a total of four hours working together to prepare vegetables for the salad bar, and there are 60 minutes in an hour, then they spend a total of 4 * 60 = 240 minutes preparing the vegetables.
Since there are three workers, the average number of minutes each worker spends preparing the vegetables is 240 / 3 = 80 minutes.
Therefore, each worker spends an average of 80 minutes preparing the vegetables for the salad bar.
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