SOLUTION: Jerry can assemble a computer​ by himself in 60 minutes. Working with an assistant, he can assemble a computer in 50 minutes. How long would it take his assistant to do it wo
Algebra ->
Customizable Word Problem Solvers
-> Travel
-> SOLUTION: Jerry can assemble a computer​ by himself in 60 minutes. Working with an assistant, he can assemble a computer in 50 minutes. How long would it take his assistant to do it wo
Log On
Question 1102958: Jerry can assemble a computer by himself in 60 minutes. Working with an assistant, he can assemble a computer in 50 minutes. How long would it take his assistant to do it working alone? Found 2 solutions by ikleyn, josgarithmetic:Answer by ikleyn(52884) (Show Source):
Their combined rate of work is of the job per minute.
In other words, they make of the job per minute.
Jerry's individual rate of work is of the job per minute.
In other words, he makes of the job per minute.
Hence, the assistant makes = = of the job per minute.
It means that the assistant needs 300 minutes = 5 hours to complete the job working alone.
Solved.
---------------------
It is a typical joint work problem.
(