SOLUTION: if a group of 15 person is required to work for 8 days to complete a project how many days will be taken to complete the project if 5 more people are added

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Question 878533: if a group of 15 person is required to work for 8 days to complete a project how many days will be taken to complete the project if 5 more people are added
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
Let r = work rate for one person.
Let t = time in days for the question.

15r%2A8=%2815%2B5%29r%2At, notice that you do not really need to know the value for rate of one person, because it is a factor to power 1 on both sides of the equation. Solve for t.