SOLUTION: 2. A man can do a job in h hours alone and his son can do it in 2h hours alone. Together, how many hours will it take them to do the job?

SOLUTION: 2. A man can do a job in h hours alone and his son can do it in 2h hours alone. Together, how many hours will it take them to do the job?

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Question 794843: 2. A man can do a job in h hours alone and his son can do it in 2h hours alone. Together, how many hours will it take them to do the job?
Answer by majo89(3) (Show Source): You can put this solution on YOUR website!
if A does a job in X hours and B in Y hours then together they will do the job in
XY/(X+Y) HOURS.
here 2h*h/3h
2/3 h hours.
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