SOLUTION: Working together, Adam and Chris can reseal a driveway in 6 hours. Working alone, Adam can reseal the driveway in 15 hours. How long would it take Chris, working alone,to reseal

Question 1181320: Working together, Adam and Chris can reseal a driveway in
6 hours. Working alone, Adam can reseal the driveway in 15
hours. How long would it take Chris, working alone,to reseal the
driveway?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Working together, Adam and Chris can reseal a driveway in
6 hours.
Together they can reseal 1/6 of the driveway in 1 hour
Working alone, Adam can reseal the driveway in 15
Adam can reseal1/15 of the driveway in 1 hour
Let Chris take x hours to complete the job alone
He does 1/x of the job in 1 hour
1/15 + 1/x = 1/6
1/x = 1/6 -1/15
1/x = 9/90 = 1/10
x= 10
Chris take 10 hours to complete the job alone

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