Delayed Start Work Word Problems
Review the Lesson | MATHguide homepage Updated April 7th, 2019

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

Mary can do a certain job in 6 minutes. Robert can do the same job in 11 minutes.

Mary and Robert work together to complete the same job. However, Mary starts working 4 minutes after Robert starts to work. How many minutes will it take for them to complete the job once Robert starts to work?