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Bill can inspect a case of cell phones in 6 hours. Jack can inspect the same case of cell Phones in 4 hours. After working alone for l hour, Bill stops for lunch. After taking a 30-minute lunch break. Bill and Jack work together to inspect the remaining cell phones. How long do Bill and Jack work together to complete the job?

发布日期:2022-06-10

Bill can inspect a case of cell phones in 6 hours....
A

1 hr. and l2 min

B

1 hr. and 24 min

C

2 hrs

D

2 hrs and lo min

E

2 hrs and 20 min

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此试题出现在

国外英语考试

美国学术能力评估考试(SAT)

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