Mathematics, 19.08.2019 03:30 kerryanne78
One person can do a certain job in 15 minutes and another person can do the same job in 30 minutes. how many minutes will it take them to do the job together?
a) 5 min
b) 10 min
c) 20 min
Answers: 1
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One person can do a certain job in 15 minutes and another person can do the same job in 30 minutes....
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