SOLUTION: A plumber can install a dishwasher in 50 min. If the plumber brings his apprentice to help, the job takes 40 minutes. How long would it take the apprentice working alone to install

Question 279379: A plumber can install a dishwasher in 50 min. If the plumber brings his apprentice to help, the job takes 40 minutes. How long would it take the apprentice working alone to install the dishwasher?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
That really depends on whether the apprentice knows what he is doing!
Considering they only saved 10 minutes with the apprentice's help I would not expect much from him.
40/50+40/x=1
4/5+40/x=1
40/x=1/5
200=x
200/60=3 hr 20 minutes
check
40/50+40/200=1
4/5+1/5=1
1=1
ok

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