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

Diagonal of a given square is 4√2 cm. What is the diagonal of the other square whose area is double of the given square?

Area of the floor of a cubical room is 64 m². The length of the longest rod that can be kept in the room is:

If the numerical value of thes perimeter of an equilateral triangle is  $$ \sqrt {3}$$ times the area of it, then the length of each side of the triangle is

If a store room of a house is in the shape of a cuboid having a length of 3 m, a width of 2 m, and a height of 4m, find the total area of its four walls.

A sphere of radius 5 cm is melted to form a cone with base of same radius. The height (in cm) of the cone is

In a triangle, two sides of 4 cm and 3 cm are at right angle. If the triangle is revolved along the 4 cm side, the curved surface area of the cone so formed will be

△ABC ∼ △DEF. If the areas of △ABC and △DEF are 100 cm² and 81 cm², respectively and the altitude of △DEF is 6.3 cm, then the corresponding altitude of △ABC is: