SOLUTION: If Sam can do a job in 4 days that Lisa can do in 6 days and Tom can do in 2 days, how long would the job take if all 3 did the job together

Question 304533: If Sam can do a job in 4 days that Lisa can do in 6 days and Tom can do in 2 days, how long would the job take if all 3 did the job together
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
If Sam can do a job in 4 days that Lisa can do in 6 days and Tom can do in 2 days, how long would the job take if all 3 did the job together
sam 4 days so he does 1/4 of the job in 1 day
Lisa 6 days so she can do 1/6 of the job in 1 day
Tom 2 days so he can do 1/2 job in 1 day
All three can do 1/4 + 1/6 + 1/2 job in 1 day
.
3/12+2/12 +6/12 = 11/12 of the job in 1 day
so to do 1 job they take 12/11 days

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