SOLUTION: If Sam can do the job in 6 days.. carla can do it in 4 days... John can do it in 2 days. How many days do they need .. if they do it together..
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Question 515208: If Sam can do the job in 6 days.. carla can do it in 4 days... John can do it in 2 days. How many days do they need .. if they do it together.. Found 2 solutions by scott8148, oberobic:Answer by scott8148(6628) (Show Source):
You can put this solution on YOUR website! they each do a fraction of the task based on their individual rates; the fractions sum to one, the whole task
You can put this solution on YOUR website! The problems hinge on the fraction of work each can do per day, times the number of days.
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(1/6 + 1/4 + 1/2)x = 1 whole job
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(2/12 + 3/12 + 6/12)x = 1
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11/12*x =1
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11x = 12
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x = 12/11
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So working together they can do the job in 12/11 of a day.
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Done.
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