Find the surface area of a wooden box whose shape is of a cube, and if the edge of the box is 12 cm.
Edge of cubic wooden box = 12 cm ∴ Surface area = 6a2=6(12)2cm2 = 6×144=864cm2
A cubical box has edge 10 cm and another cuboidal box is 12.5 cm long, 10 cm wide and 8 cm high.
(i) Which box has smaller total surface area?
(ii) If each edge of the cube is doubled, how many times will its T.S.A increase?