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.
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older model requires 3 hours longer than the newer model to execute the program.
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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.