SOLUTION: Working together, Brad and Mike can complete a job in 3 hours. If it takes mike 5 hours to do the job alone,how long would it take Brad to do the job alone?
PLZ help
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Question 710489: Working together, Brad and Mike can complete a job in 3 hours. If it takes mike 5 hours to do the job alone,how long would it take Brad to do the job alone?
PLZ help
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Working together, Brad and Mike can complete a job in 3 hours. If it takes mike 5 hours to do the job alone,how long would it take Brad to do the job alone?
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Together rate:: 1/3 job/hr
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Mike rate: 1/5 job/hr
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Brad rate: 1/x job/hr
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Equation:
rate + rate = together rate
1/x + 1/5 = 1/3
----
15 + 3x = 5x
2x = 15
x = 7.5 hrs (time for Brad to do the job alone)
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Cheers,
Stan H.
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