 Hello and welcome to this session. In this session we will discuss about volumes. Measure of the space occupied by the solid object is called the volume of the object. Now we shall discuss the formulae for the volume of different solid figures. First we have volume of a cuboid is given by the formula L into B into H where L is the length of the cuboid, B is the breadth of the cuboid and H is the height of the cuboid. Consider a cuboid of length 2 cm, breadth 3 cm and height 4 cm then volume of the cuboid is given by L into B into H centimeter cube since the unit of measurement of volume is cubic units. So this comes out to be equal to 24 cm cube. Next we have volume of a cube is given by the formula A cube where this A is the edge of the cube. Consider a cube whose edge A is equal to 2 cm then the volume of the cube is equal to A cube that is 8 cm cube. Next we have volume of a cylinder is given by pi R square H where this R is the base radius of the cylinder and H is the height of the cylinder. Consider this cylinder with height H equal to 4 cm and the base radius R equal to 3 cm then the volume of the cylinder is given by pi R square H. This comes out to be equal to 792 upon 7 that is equal to 113.14 cm cube. Now the formula for the volume of a right circular cone or you can say volume of a cone is given by 1 by 3 pi R square H where again this R is the base radius of the cone and H is the height of the cone. Consider this right circular cone where the height H of the right circular cone is equal to 7 cm the base radius R is equal to 6 cm. So now volume of this cone is given by 1 upon 3 multiplied by pi into R square into H. So this is equal to 22 into 12 so we get volume of this cone is equal to 264 cm cube. Now the formula for the volume of the sphere is equal to 4 upon 3 pi R cube where this R is the radius of the sphere and the formula for the volume of the hemisphere is given by 2 upon 3 pi R cube that is half the volume of the sphere. Consider this hemisphere with radius 7 cm now it's volume is given by 2 by 3 pi R cube that is this is equal to 2156 upon 3 which comes out to be equal to 718.66 cm cube is the volume of the given hemisphere. This completes the session hope you have understood how we find the volume of cuboid, cube, cylinder, cone, sphere and hemisphere.