easy · GMAT Quantitative Reasoning
Machine X can complete a task in 6 hours, and Machine Y can complete the same task in 9 hours. The two machines begin the task at the same time and work together until it is complete.
How many hours will it take to complete the task?
- 7.5 hours
- 5 hours
- 3.6 hours
- 15 hours
- 3 hours
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