# SOLUTION: Alan can build a brick wall in 9 hours. Carl can build the same wall in 18 hours. Mr. Alan started to build the wall, worked for 3 hours, and then stopped working. How many hours w

Algebra ->  Algebra  -> Rate-of-work-word-problems -> SOLUTION: Alan can build a brick wall in 9 hours. Carl can build the same wall in 18 hours. Mr. Alan started to build the wall, worked for 3 hours, and then stopped working. How many hours w      Log On

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 Click here to see ALL problems on Rate-of-work-word-problems Question 391838: Alan can build a brick wall in 9 hours. Carl can build the same wall in 18 hours. Mr. Alan started to build the wall, worked for 3 hours, and then stopped working. How many hours would Carl require to complete the wall?Answer by ankor@dixie-net.com(15629)   (Show Source): You can put this solution on YOUR website!Alan can build a brick wall in 9 hours. Carl can build the same wall in 18 hours. Mr. Alan started to build the wall, worked for 3 hours, and then stopped working. How many hours would Carl require to complete the wall? : Let c = no. of hrs to complete the wall by Carl : Let the completed wall = 1 : Each will do a fraction of the wall, the two fractions add up to 1 : + = 1 Multiply equation b;y 18 to clear the denominators 2(3) + c = 18 c = 18 - 6 c = 12 hrs to complete the wall :