**(01) An iron cube of side 10 cm is hammered into a rectangular sheet of thickness 0.5 cm. If the side of the sheet are in the ratio 1:5, then find the length of the sides of the cuboid**

**(02) Three cubes of iron whose edges are 6 cm, 8 cm and 10 cm respectively are melted and formed into a single cube. The edge of the new cube formed is**?

**(03) A cube of edge 5 cm is cut into cubes each of edge 1 cm. The ratio of the total surface area of one of the small cube to that of the large cube is equal to?**

**(04) The volume of two cubes are in the ratio 8 : 27. Then the ratio of the area of the face of one cube to that of another is?**

**(05) If the edge of a cube is increased by 25%, then percentage increase in its surface area is**