The length of the diagonal of a square is 'a' cm. Which of the following represents the area of the square (in sq. cm)? 

A hollow iron pipe is 21 cm long and its exterior diameter is 8 cm. If the thickness of the pipe is 1 cm and iron weights $$ 8 g/cm^3 $$, then the weight of the pipe ($$ π= {22\over7}$$) is. 

The volume of a cube is $$ 512{cm}^{3}$$. Its surface area (in sq cm) is 

A square and an equilateral triangle are of the same perimeter. If the diagonal of the square is $$ {12\sqrt{2}}$$ cm long, then the area of the triangle is.

The total surface area of a cube is 864 square cm. What will be its volume?

The ratio of the volume of right circular cylinder and a right circular cone of the same base and height will be:

The base of right prism is a trapezium whose parallel sides are 11 cm and 15 cm and the distance between them is 9 cm. If the volume of the prism is 1731.6 cm³, then the height (in cm) of the prism will be:

The heights of a cone, cylinder and hemisphere are equal. If their radii are in the ratio 2:3:1, then the ratio of their volumes is: