SOLUTION: two workers X and Y can do a job together in 4 hours. if X alone takes alone 6 hours, then how long will y alone do the job?

Question 831236: two workers X and Y can do a job together in 4 hours. if X alone takes alone 6 hours, then how long will y alone do the job?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
two workers X and Y can do a job together in 4 hours. if X alone takes alone 6 hours, then how long will y alone do the job?
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Together rate: 1/4 job/hr
X rate: 1/6 job/hr
Y rate: 1/x job/hr
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Equation:
rate + rate = together rate
1/x + 1/6 = 1/4
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Multiply thru by 12x to get:
12 + 2x = 3x
x = 12 hrs (time for "y" to do the job alone
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Cheers,
Stan H.
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