SOLUTION: A plumber and an assistant finished a job in 4h. The job would have taken the plumber 6 h working alone. how long would the job have taken the assistant working alone?

Question 342164: A plumber and an assistant finished a job in 4h. The job would have taken the plumber 6 h working alone. how long would the job have taken the assistant working alone?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A plumber and an assistant finished a job in 4h.
The job would have taken the plumber 6 h working alone.
how long would the job have taken the assistant working alone?
;
Let a = time required by assistant working alone
;
Let the completed job = 1
:
+ = 1
multiply by 6a, results:
4a + 6(4) = 6a
24 = 6a - 4a
24 = 2a
a =
a = 12 hrs, assistant alone
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