SOLUTION: An experienced bricklayer can build a wall three times as fast as an apprentice bricklayer. When working together they can build the same wall in 9 hours. How long will it take the

Algebra ->  Rate-of-work-word-problems -> SOLUTION: An experienced bricklayer can build a wall three times as fast as an apprentice bricklayer. When working together they can build the same wall in 9 hours. How long will it take the      Log On


   

Question 932660: An experienced bricklayer can build a wall three times as fast as an apprentice bricklayer. When working together they can build the same wall in 9 hours. How long will it take the apprentice bricklayer working by himself to build the wall?
Answer by josgarithmetic(39614) About Me  (Show Source):
You can put this solution on YOUR website!
r, the speed of the apprentice.


3r%2Br=1%2F9;
and note that r is in units of WALLS PER HOUR.
Solve for r. You are probably interested in 1%2Fr.