The initial height on each side was and was added to one side, so the sum of the heights on the two sides must be
Also, the pressure below the top of the left column must equal to the pressure at that same height on the right column. Therefore, the weight of the fluid above each of these locations must be the same
where is the acceleration of gravity and is the cross-sectional area of the tube. The above equation reduces to
The solution to equations (1) and (2) is
Therefore, the desired ratio is
Therefore, answer (C) is correct.