Given a circle, a circumscribed square is one that completely encloses the circle, and an inscribed square is completely enclosed by the circle, as shown below

If the the difference in the areas of the two squares is 28 sq. m., then what is the area of the circle in sq. m.? Assume π =

A sphere and a right circular cylinder have the same radius. If the volume of the sphere is one fifth of the volume of the cylinder, what is the ratio of the height of the cylinder to its radius?

The sides of a triangular field are 10 m, 13 m and 13 m. Find the number of rose beds that can be prepared in the field, if each rose bed, on an average needs 800 cm^{2} space.