<PRE><B>Question 1083512</B>
in 1 minute, Jan does 1/60 of the job
together, they can do 1/50 of a job in 1 minute
assistant takes x minutes to assemble a computer
assistant does 1/x of the job in a minute
50 minutes to complete it together
(50/60)+(50/x)=1
multiply by 60x
50x+3000=60x
10x=3000
x=300 minutes ANSWER
50/60+50/300=5/6+1/6=1
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