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? @mathstudent55

Question

radar · Answer

Let 3x = slow irrigation system
Let x= fast irrigation system
Both systems working together would be using product over sum:|dw:1375468420967:dw|