Mathematics, 03.05.2021 18:30 tylermorse3775

One irrigation system needs about 3 times as long to complete a job as another irrigation system. When both systems operate at the same time, the job can be completed in 9 hours. How much time is required for the faster system to complete the job by itself?

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One irrigation system needs about 3 times as long to complete a job as another irrigation system. Wh...