Problem: a cube of edge 7 cm is cut into cubes each of edge 1 cm . the ratio of the total surface area of one of the small cubes to that of the large cube is equal to :
Rationale: "sol . required ratio = 6 * 1 * 1 / 6 * 7 * 7 = 1 / 49 = 1 : 49 . answer b"
annotated_formula: divide(const_4, const_100)