The ratio of the areas of two isosceles triangles having the same vertical angle is 1 : 9.The ratio of their heights is -

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

A right triangle with sides 5 cm, 12 cm and   13 cm is rotated about the side 12 cm to from a cone. The volume of the cone so formed is :

The height of a cone is 16 cm and radius of its base is 30 cm. If the rate of painting it is Rs.14/cm², then what will be the total cost in painting the curved surface of cone from outside?

The wooden box measure 20 cm by 12 cm by 10 cm. Thickness of wood is 1 cm. The volume of wood to make the box (in cubic cm) is 

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 corner of a cube of side length 8 m. When cut by a plane which bisects the sides of the cube, we get a pyramid whose volume is : 

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