Problema Solution
There are two machines that produce aluminum cans. The newer machine can produce 4200 cans in 210 minutes. It takes the older machine 280 minutes to produce that many cans. If the two machines work together, how long will it take them to produce 4200 cans?
Answer provided by our tutors
The rate of the new machine is 1/210 per minute for the 4200 cans.
The rate of the other machine is 1/280.
Adding those:
1/210 + 1/280
= 1/120 per minute for 4200 cans
That's the total rate.
Therefore, the total time is 120 minutes
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