SOLUTION: mr a can do a job for 3 days while mr b can do the same job for 6 days. if the two of them work together in how many days would the job be done

Question 619406: mr a can do a job for 3 days while mr b can do the same job for 6 days. if the two of them work together in how many days would the job be done
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
mr a can do a job for 3 days while mr b can do the same job for 6 days. if the two of them work together in how many days would the job be done
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a's rate: 1/3 job/day
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b's rate: 1/6 job/day
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together rate: 1/x job/day
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Equation:
rate + rate = together rate
1/3 + 1/6 = 1/x
2x + x = 6
3x = 6
x = 2 hrs (time to do the job together)
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Cheers,
Stan H.
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