GMAT Problem Solving
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Source: PREP
Level: 0
While working alone at their respective constant rates, computer X processes 240 files in 4 hours and computer Y processes240 files in 8 hours. If all files processed by these computers are the same size, how long would it take the two computers, working at the same time and at their respective constant rates, to process a total of 240 files?
- A 2 hr
- B 2 hr 20 min
- C 2 hr 40 min
- D 6hr
- E 6 hr 20 min