
How to convert this multi source flow network in to single source flow network and find the maximum flow in that?

How to convert this multi source flow network in to single source flow network and find the maximum flow in that?
You create a dummy source node, called Source, and draw a directed edge of close-to-infinite-capacity (e.g. sum of capacities of all edges of the graph) from Source to each tank. Every flow in the resulting graph is in one-to-one correspondence with the original multi-source graph.