Question 1150752
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Machine A produces  {{{1000/4}}} = 250  sausages per hour.


Machine B produces  {{{1000/8}}} = 125  sausages per hour.


Machines A and B together produce  250 + 125 = 375 sausages per hour.


To produce  1000 sausages,  the two machines should work  {{{1000/375}}} = {{{8/3}}} hours, i.e. 2 hours and 40 minutes.    <U>ANSWER</U>
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Solved.