The figure below shows the nodes (A-I) and capacities (labelled on arcs in packages/day) of a shipping network. The firm would like to know how many packages per day can flow from node A to node I. Which nodes are the sink and source for this problem?
A) Node A is the sink, Node I is the source.
B) Node A is the sink, Node B is the source.
C) Node B is the sink, Node I is the source.
D) Node B is the source, Node I is the sink.
E) Node A is the source, Node I is the sink.

Question

The figure below shows the nodes (A-I) and capacities (labelled on arcs in packages/day) of a shipping network. The firm would like to know how many packages per day can flow from node A to node I.  Which nodes are the sink and source for this problem?
A) Node A is the sink, Node I is the source. 
B) Node A is the sink, Node B is the source. 
C) Node B is the sink, Node I is the source. 
D) Node B is the source, Node I is the sink. 
E) Node A is the source, Node I is the sink.

Quizplus · Accepted Answer

In a transportation network, the source node is where the items originate from and the sink node is where the items are ultimately delivered to. In this case, node A is the origin and node I is the destination, making A the source and I the sink. Therefore, the correct answer is E.

The Figure Below Shows the Nodes (A-I) and Capacities (Labelled