SOLUTION: Working together, two computers can execute a program in 5 hours. Individually, the older model requires 3 hours longer than the newer model to execute the program.

Question 815902: Working together, two computers can execute a program in 5 hours. Individually, the
older model requires 3 hours longer than the newer model to execute the program.
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
Let h = the time in hours for the new computer to do THE ONE JOB.
Theses numbers or expressions represent the three different work rates:
Old, 1/(h+3)
New, 1/h
Together, 1/5
Watch carefully that those rates are in jobs per hour.

Old computer's rate plus New computer's rate is the rate for both computers working together.

If you solve for h, then you can also determine or compute the old computer's rate.
RELATED QUESTIONS
Three men can individually do a job in 5, 6 and 7 hours respectively. What is the... (answered by Edwin McCravy)

Math problem: One slower computer, working alone takes 4 hours longer than a faster... (answered by stanbon)

An old computer can do the weekly payroll in 5 hours. A newer computer can do the same... (answered by Theo)

Working together, pump c and d can drain 2 pools in 21 hours. How long would it take each (answered by josgarithmetic)

When working alone, Bob takes 3 hours longer then Janet to paint a certain size room.... (answered by josmiceli)

Two brothers can do a job together in 6 hours. Working alone, the younger brother takes 2 (answered by josgarithmetic)

Two brothers can do a job together in 6 hours. Working alone, the younger brother takes 2 (answered by solver91311)

Two brothers can do a job together in 6 hours. Working alone, the younger brother takes 2 (answered by josgarithmetic)

Hi, I would like to say thank you in advance. My question is: A certain punch... (answered by josgarithmetic,Boreal)