SOLUTION: father can finish a certain job in 8 days while his daughter can finish the same job in 16 days. they start working together after 4 days the daughter leaves and his father alone f

Question 714715: father can finish a certain job in 8 days while his daughter can finish the same job in 16 days. they start working together after 4 days the daughter leaves and his father alone finishes the work. How many days did it take the fateher to finish the job?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
They work together for 4 days
Add their rates of working

Multiply both sides by

They complete 3/4 of the job, there
is 1/4 of the job left to do
( fraction of the job left ) / ( father's rate ) = time to finish

It takes the father 6 days to finish the job

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