SOLUTION: If Sam can do a job in 4 days and Lisa can do it in 6 days and tom in 2 days, how long would the job take if Sam, Lisa and Tom worked together to complete it?
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Question 199321: If Sam can do a job in 4 days and Lisa can do it in 6 days and tom in 2 days, how long would the job take if Sam, Lisa and Tom worked together to complete it? Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! If Sam can do a job in 4 days and Lisa can do it in 6 days and tom in 2 days,
how long would the job take if Sam, Lisa and Tom worked together to complete it?
:
Let t = time required if all three work together
Let the completed job = 1
: + + = 1
Multiply equation by 12 to get rid of the denominators, results:
3t + 2t + 6t = 12
11t = 12
t = days or (12/11) * 24 ~ 26.2 hrs
