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:  Answers.
A) 1:25	B) 1:49	C) 1:52	D) 1:522	E) None
Sol.   Required ratio = 6 * 1 * 1 / 6 * 7 * 7 = 1/49 = 1:49.   Answer 1:49
<result>B</result>
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: