SOLUTION: if father done a job in 12 days and son done in 6 days?how many days they takes together to done this job?

SOLUTION: if father done a job in 12 days and son done in 6 days?how many days they takes together to done this job?

Algebra.Com

Question 987364: if father done a job in 12 days and son done in 6 days?how many days they takes together to done this job?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
In one day, father does (1/12) and son does (1/6)
Together, they do (3/12) of the job in 1 day.
1/(3/12)=4 days to do the job together.
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