Ana and Amy started a landscaping job to...

Ana and Amy started a landscaping job together. When Ana stopped, she had completed `2/5` of the job. When Amy stopped, she had completed `1/3` of the job. Then Ruben complete the rest of the job in 2 hours. Assume that Ana, Amy and Ruben all worked at the same rate. Which of the following values is closest to the number of hours it would have taken 1 of them to complete the entire job alone?

`0.37`

`1.27`

`2.73`

`7.50`

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