SOLUTION: There are two machines that produce aluminum cans. The newer machine can produce7200 cans in 200 minutes. It takes the older machine 300 minutes to produce that many cans. If the

Question 221213: There are two machines that produce aluminum cans. The newer machine can produce7200 cans in 200 minutes. It takes the older machine 300 minutes to produce that many cans. If the two machines work together, how long will it take them to produce 7200 cans?

Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Add the rates of producing cans for each machine
to get the rate for both machines working together
Let the time for both machines woking together
to make cans = min
given:
Rate of newer machine = cans/min
Rate of older machine = cans/min
------------------------------------------------
I can write the equation as

Divide both sides by

Multiply both sides by

Working together, it takes them 120 minutes to make 7200 cans

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