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John can do a certain job in 3 hourssarah can do the same jobin 7 hoursJane can
A motorboat can travel 4 km upstream in the same time it cantravel 9 km downstre
September 15, 2020can l get help writting this paper any ideas on how to goabout it should l add p
September 15, 2020John can do a certain job in 3 hourssarah can do the same jobin 7 hoursJane can do the same job in 5 hourshow long will thejob take the three of them working together?
