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September 23, 2014

September 23, 2014

Posted by **Bob** on Tuesday, October 16, 2012 at 5:41pm.

- Algebra -
**Steve**, Tuesday, October 16, 2012 at 6:14pmif it took 3 people 1 day, each person would be doing 1/3 job/day

It takes 5 days, so a person does 1/15 job/day

4 people can therefore do 4/15 job/day

a whole job will therefore take 15/4 days

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