A cube is 7 cm on an edge and another cube is 14 cm on an edge. The ratios of their curved surface areas are
1:2
4:1
2:1
1:4
The diameter of one sphere is 21 cm, and the diameter of another sphere is 14 cm, the ratios of their curved surface areas is
The ratio of edges of two cubes is 1:2, so the ratio of their surface areas is
A cube of edge 5 cm is divided 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: