Unknown Rate Work Word Problems
Review the Lesson | MATHguide homepage Updated November 27th, 2016

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Answer the following work problem. Report your answer to the nearest tenth of a hour.


Alone, Maria can do a certain job in 9 hours. When Maria and Kris work together, they can finish the same job in 3 hours.

How long would it take Kris to do the job alone?


hours