jessieCochrane8538 jessieCochrane8538

20-11-2017
Mathematics

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Find how long it would take to do a job together if it takes one person 6 hours alone and it takes another person 14 hours alone.

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jorel1380 jorel1380

21-11-2017

1/6+1/14=1/n
14/84+6/84=1/n
20/84=1/n
84=20n
n=84/20=21/5 hours working together
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