Unknown Rate Work Word Problems
Review the Lesson | MATHguide homepage Updated June 18th, 2023

Waiting for your answers...

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


Alone, Petra can do a certain job in 25 weeks. When Petra and Mary work together, they can finish the same job in 17 weeks.

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


weeks