Check the figure given with this question. You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

Logic Picture Riddle

The figure given is self-explanatory. But if you are unable to understand, here is what we did. We cut along the lines and remove the blue parts. Now rotate the paper a bit and place the cut parts like it is shown.