If the number of surfaces of cuboid is x, the number of edges is y, the number of vertices is z and the number of diagonal is p, let us write the value of x-y + z + p.

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]

Let us fill in the blanks:

(i) The number of diagonals of a cuboid is ________.

(ii) The length of diagonal on the surface of a cube = ________× the length of one edge.

(iii) If the length, breadth and height of a rectangular parallelepiped are equal, then the special name of this solid is _________.

The length of the dimensions of 2 cuboids are 4,6,4 units and 8, (2h-1) , 2 units respectively. If the volume of 2 cuboids are equal, then let us write the value of h.

If each edge of a cube is increases by 50%, then how much total surface area of the cube will be increased in %?