The ratio of volume of 2 cubes is 1:27, the ratio of total surface areas of 2 cubes are

The length breadth and height of a cuboidal hole are 40m, 12m and 16m respectively. The number of planks having the height of 5m and breadth of 4m and thickness of 2m , can be kept in that hole is

The surface area of cube is 256 sq. m, the volume of the cube is

If the total surface area of a cube is s sq. unit and the length of the diagonal is d unit, then the relation between s and d is

Let us write true/false of the following statements:

(i) If the length of each of a cube is twice of that 1^st cube then the

volume of this cube is 4 times more than that of the 1^st cube.

(ii) In rainy season, the height of rainfall in 2 hectare land is 5 cm, the volume of rain water is 1000 cubic metre.

[hint: 1 are = 100 sq. m,1 hectre = 100are]