It takes Mr. twice as long as Mrs. to unload and unpack the groceries. Working together they can unload and unpack the groceries in 16 minutes. How much time would it takes each person to unload and unpack the groceries working alone?

Randy and trey take turns cleaning offices on the weekends. it takes randy at most 4 hours to clean the offices. it takes trey at most 6 hours to clean the offices. what is the greatest amount of time it would take them to clean the offices together? 2.4 hours 2.5 hours