SOLUTION: two brothers are digging a drainage ditch for a french drain around there home. the ditch is to be 2 feet deep,1 foot wide and 40 feet long. the older brother can dig the ditch in
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Question 322403: two brothers are digging a drainage ditch for a french drain around there home. the ditch is to be 2 feet deep,1 foot wide and 40 feet long. the older brother can dig the ditch in 14 hours. the younger brother can dig the ditch in 17 hours. how long will the two brothers take if they both work together take to dig the ditch?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
If A can do a job in x time periods, then A can do 
of the job in 1 time period. Likewise, if B can do the same job in y time periods, then B can do 
of the job in 1 time period.
So, working together, they can do
of the job in 1 time period.
Therefore, they can do the whole job in:
time periods.
John
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