While working aloneat their respective constant rates, computer X processes 240 files in 4 hoursand computer Y processes 240 files in 8 hours. If all files processed by these computers are the same size, how longwould it take the two computers, working at the same time and at their respectiveconstant rates, to process a total of 240 files?


2 hr

2 hr 20 min

2 hr 40 min

6 hr

6 hr 20 min

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Prep2007E1-PS