Ashish,
Water level will be slightly higher than the terminal elevation of both pipe to accommodate the pressure drop taking place in pipe and in the entrance of pipe tapping. Let it be "H". (As linda said, you can keep 0.035 bar/100m as drop for your problem)
Here, pipe B length is more than pipe A. Hence, for the equal flow rate and same dia of pipe, pipe B will have slight more pressure drop than pipe A and for the same dia of pipe, you cannot get the equal flow rate in both pipes. For this, pipe B dia need to be increased little to match the same flow rate in pipe A. You can simply do calculation in excel by using below reference.
For both the pipes,
VA2/2g + h A loss = H = VB2/2g + h B loss
where,
h A loss , h B loss head losses in pipe A & B.
(h A loss, h B loss= drop due to pipe + bend + entrance loss)
VA & VB are the velocities in pipe A & B.