One person can do a certain job in fifteen minutes, and another person can do the same job in thirty minutes. How many minutes will it take them to do the job together? 5 min 10 min 20 min

QUESTION POSTED AT 02/06/2020 - 01:25 AM

Answered by admin AT 02/06/2020 - 01:25 AM

10 min 

1/15
1/30

1/15+1/30 = 3/30 = 1/10
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QUESTION POSTED AT 01/06/2020 - 04:46 PM