Since each row requires 6.491 gallons of water per day, that means that you will multiply 6.491 by 28, because there are 28 rows of vegetables. The farmer needs 181.748 gallons per day. To find out how much water each plant needs, you will divide 6.491 by 10, because there are 10 plants in each row. The answer should be 0.6491 gallons of water per plant.
28 rows times 6.491 gallons/day = 181.75 gallons/day.
That's per row. Each of the 10 plants in each row would receive
6.491 gallons water per row
------------------------------------------- = 0.649 gallon/plant
10 plants per row
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