SOLUTION: If Sam completes a job in 4 days, Susan completes the job in 6 days and Tom completes the job in 2 days. How many days would it take them to complete the job altogether? The an

Question 203342: If Sam completes a job in 4 days, Susan completes the job in 6 days and Tom completes the job in 2 days. How many days would it take them to complete the job altogether?
The answer is given as 1.09. I don't get it. Please help
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Try this, find the daily rate of each of the individuals!
If Sam can complete the job in 4 days, then he can do 1/4 of the job in 1 day.
If Susan can complete the job in 6 days, then she can do 1/6 of the job in 1 day.
If Tom can complete the job in 2 days, then he can do 1/2 the job in 1 day.
Working together, the three of them can do (1/4+1/6+1/2 = 11/12) of the job in 1 day.
This means that it will take them 12/11 days to complete the job working together.
or 1.09 days.
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