Pedro builds in a corner of his room this tower with wooden cubes that have a 2cm edge. 

9 to 11 year olds

He must paint his tower red, on all sides, including the non-visible ones and the base, what is the difference in the surface to be painted if Pedro disassembles the structure and paints each cube separately or if he paints it assembled? 

Taken from: https://pasemosunrato.compematic.com/​