1. Problems

Rob can complete his bus route in 4 hours. Joan can complete her bus route in 2 hours. If they both left the terminal at 3:00 am and after each completed route returned to the terminal, determine the next time they would leave the terminal at the same time.
A) 7:00 am B) 11:00 am
C) 5:00 am D) Not enough information given to tell

2. Because it does not tell you how far from the finish of each persons route is from the terminal, it would seem impossible to know how fast it takes each to get back to the terminal and then start their next route.

From this I would say the answer is D.

3. Originally Posted by westdivo
Rob can complete his bus route in 4 hours. Joan can complete her bus route in 2 hours. If they both left the terminal at 3:00 am and after each completed route returned to the terminal, determine the next time they would leave the terminal at the same time.
A) 7:00 am B) 11:00 am
C) 5:00 am D) Not enough information given to tell
[b]If[\b] you assume that the "time to complete the route" includes coming back to the terminal (and time at the terminal), then this is easy.

Joan completes her route every 2 hours so, starting at 3:00 am, she willl be back at the terminal at 5:00, 7:00, 9:00, 11:00, etc., just adding 2 to each time.

Rob completes his route every 4 hours so, starting at 3:00 am, he will be back at the terminal at 7:00, 11:00, 3:00 pm, etc., just adding 4 each time.

When are they at the terminal together?