medium · GMAT Quant
A senior editor can proofread a manuscript alone in 8 hours. A junior editor works at exactly half the senior editor's rate. The senior editor works alone for the first 2 hours, after which the junior editor joins to finish the manuscript together.
How many total hours does the proofreading take, from when the senior editor begins to when the manuscript is completed?
- 4 hours
- 5 hours
- 6 hours
- 7 hours
- 8 hours
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