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Claire can complete spring-cleaning in a house in 5 hours. Ruth can complete spring-cleaning in the same house in 7 hours. If Claire works for 1 hour alone and then Ruth joins her to finish the cleaning, what is the total time it takes to complete spring cleaning?

发布日期:2021-09-15

Claire can complete spring-cleaning in a house in ...
A

2 hours, 30 minutes

B

2 hours, 20 minutes

C

3 hours, 20 minutes

D

3 hours

E

2 hours, 33 minutes

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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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