Final answer:
The rate at which the group of workers can plant is 3 acres per day, calculated by dividing the total acres planted by the total number of days.
Step-by-step explanation:
The question asks about the rate at which a group of workers can plant acres. Since the group can plant 18 acres in 6 days, to find the rate per day, we divide the total acres by the number of days. The calculation is 18 acres / 6 days = 3 acres per day.
Therefore, the work rate of the workers is 3 acres per day.