Answer
The magnetic flux per meter is zero.
Work Step by Step
By the right hand rule, the magnetic field produced due to the current in each wire is directed in opposite directions in the area between the wires.
By symmetry, the total magnetic flux in the area between the wires due to each current is equal in magnitude.
Since the magnetic flux due to each current is directed in the opposite directions, they cancel each other out and the net flux is zero.
The magnetic flux per meter is zero.
