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 Sam, Lisa, and Tom worked together to complete it?
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Question 91585: 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 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 that Lisa can do in 6 days and Tom can do in 2 days, how long would the job take if Sam, Lisa, and Tom worked together to complete it?
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Let t = time required if all 3 work together
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Let the completed job = 1
: + + = 1
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Get rid of the denominators, multiply equation by 12 and you have;
3t + 2t + 6t = 12
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11t = 12
:
t = 12/11 days
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Which is: 1 day, 2 hrs, 10 min, 54.5 seconds
