Hi, I need help with problem 11-20. I was able to do problem 11-19 and I get 13 is the flow. But I'm not understanding how to do problem 11-20. How do I add the 200 cars flow in the network? The book solution says 17 but don't know how to get to that number.

11-19 The road system around the hotel complex on International Drive (node 1) to Disney World (node 11) in Orlando, Florida, is shown in the network of Figure 11.27. The numbers by the nodes represent the traffic flow in hundreds of cars per hour. What is the maximum flow of cars from the hotel complex to Disney World?

11-20 A road construction project would increase the road capacity around the outside roads from International Drive to Disney World by 200 cars per hour (see Problem 11-19). The two paths affected would be 1-2-6-9-11 and 1-5-8-10-11. What impact would this have on the total flow of cars? Would the total flow of cars increase by 400 cars per hour?

how do you get the 1/3 (5/2*200....)?

FIGURE 11.27 Network for Problem 11-19 10 FIGURE 11.27 Network for Problem 11-19 10