Sue, an experienced shipping clerk, can fill a certain order in 5 hours. Jim, a new clerk, needs 12 hours to do the same job. Working together, how long will it take them to fill the order?
3 answers
1/5 + 1/12 = 1/x
Okay, so I got 60/17 = 3.529 hours?
looks good to me.
1 answer