SOLUTION: One computer requires 75 minutes to solve a complex math problem. A faster one requires 50 minutes for the same problem. How long would it take if both computers work together?

Question 1133824: One computer requires 75 minutes to solve a complex math problem. A faster one
requires 50 minutes for the same problem. How long would it take if both computers
work together?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Add their rates of working to get
their rate working together
1st rate:
[ 1 problem solved ] / [ 75 min ]
2nd rate:
[ 1 problem solved ] / [ 50 min ]
------------------------------------
Let = their rate working together
in problems/min

Multiply both sides by

It takes them 30 min working together
--------------------------------------------
check:

OK
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