Mathematics, 15.11.2020 22:40 Xaviiier

PLEASE answer. I'm not very good at these kind of problems: Working alone, Dan can do a certain job in three hours and Stan can do the same job in two hours. At these rates, how long would it take Dan and Stan to do this job working together?

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PLEASE answer. I'm not very good at these kind of problems: Working alone, Dan can do a certain job...