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
If all files processed by these computers are the same size,理解错误,不是说每台处理120份