A paper is rectangular in shape with negligible thickness. A stack of papers is arranged one above the other.
S1 : The resulting figure is three dimensional.
S2 : The figure is called a cuboid.
S1 and S2 are true
A single sheet of paper is 2 dimensional having only length and breadth since thickness is negligible. Stacking of papers results in a figure having length , breadth and height (thickness). Therefore S1 is true. The resulting figure is called a cuboid. Thus S2 is also true. Hence both S1 and S2 are true.