<PRE><B>Question 468942</B>
one machine can seal 360 packages/hr, an older machine can seal 140packages/hr. how amny minytes together will the two machines working together take to seal a total of 700 packages? answers:48,72,84,90,1-8
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rate + rate = together rate
360 + 140 = x packages/hour
x = 500 packages/hour
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time = 1/500 hr/package
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Time for 700 packages = 700(1/500) = 7/5 hr = 1 hr. 24 minutes or 84 minutes
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Cheers,
Stan H.

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