<PRE><B>Question 250717</B>
This is what I call job / time. Here is the formula:
J1/T1 * (together time) + J2/T2 * (together time) = total number of jobs.
J1 is firs persons number of jobs
T1 is first persons time to do the jobs.

Two machines fill cereal box. So, J1 = J2 = 1; B total cereal boxes. 
T1 = T2; same rate.
At this pint we have the following equation:
(1/t)(4) + (1/t)(4) + (1/t)(26) = B.
We have to add the alone time of the second machine after the first breaks down. We don&#39;t know how many total boxes were to be filled.
Continuing
8/t + 26/t = B
34 = Bt
t = 34/B
This gives you the time to fill B boxes.
Hope this helps.
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