Find the area of a white sheet required to prepare a cone with a height of 21cm and the radius of 20cm.

A circular ground of radius  7 m is surrounded by a path of width 3.5 m. Find the area of path.

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

What is the area of a rectangle , if its diagonal s 61 cm and one of its sides is 11 cm ? 

The curved surface area of a cylindrical pillar is 264 square meter and its volume is 924 cubic meters. Find the ratio of its diameter to its height.

Two cones have their heights in the ratio 1:3 and the radii of their bases in the ratio 3:1. Find the ratio of their volumes?

What is total surface area of a cone where, r’ is radius and ‘l’ is slant height?   

The area of an equilateral triangle inscribed in a circle is  . The area of the circle is: