 Hello and welcome to the session. In this session, we are going to discuss how to find the value of right rectangular prisms and pyramids. First of all, let us discuss how to find the value of right rectangular prisms. A rectangular prism is a three-dimensional figure whose all rectangular prisms and a right rectangular prism is a prism whose faces are perpendicular lining edges. Now, this is a right rectangular prism which is a three-dimensional figure whose all the faces are rectangles and the base faces are perpendicular to the joining edges. W and h are the length, width and height respectively of this right rectangular prism. Now, we know that the value of any solid is the space occupied by the solid or the capacity of that solid. Now, let us learn how to find the value of a right rectangular prism. The value of any solid is measured in cubic units. That is, the number of cubes of unit volume required to fill the solid completely, like blocks in a box or bricks in a wall. The value of any three-dimensional figure is its area of base into height. So, for a right rectangular prism with length l, w and height, that is, the area of this rectangular base with length l and width w will be equal to l into w and the height of the prism is h. So, the volume of the right rectangular prism is equal to p of its space into height. Now, area of the base is l into w and height is n is equal to l into w double into equal to l w n. Now, suppose we want to find the volume of a wall with dimensions 10 meters by 5 meters by 8 meters, let the wall is made up of bricks of unit length width. Now, we shall find the number of bricks required to make the wall of bricks of unit length required on the length of the wall 10. Similarly, as the width of the wall is 5 meters, so the number of bricks of unit length required along the width of the wall in one row of bricks is equal to is 8 meters, therefore, number of bricks of unit length required along the height. The required number of bricks to make the wall is equal to 8 into 50, which is equal to 400 bricks. Unit length, width and height. So, each brick is a cube of size 1 meter and l is made up of 400 bricks, so the volume cube width meter. Now, by the formula, we have volume of the right rectangular prism is equal to l w h. Now, applying the formula, we can find the volume of the wall, which is a right rectangular prism. So, the volume of the wall will be equal to l w h. Now, length of the wall is 10 meters, width is 5 meters and height is 8 meters. These values here, this is equal to 10 into 5 into 8, which is equal to 400 cubic meter. By applying the formula, we can find out the volume of the wall, find the volume of the rectangular prism if the length, width and height of the rectangular prism are given to us. Now, let us see one remark. If length, width and height of the rectangular prism are in meters, then it is in cubic meter if length, width and height are in centimeters, then the volume, that is the volume of the rectangular prism is in cubic centimeter. Also, the units, three dimensions should be same. That is, the units of length, width and height should be same. If not, they will converge and the three dimensions into same units and then we will apply the formula to find out the volume of the prism. Now, our pyramid, three-dimensional figure is a pyramid and the little faces joined at a single vertex. Now, this is the pyramid, which is a three-dimensional figure whose base is a polygon and the little faces are the triangles joined at a single vertex, which is called the apex. Now, volume of the pyramid is one third the area of the base into the height of the apex. That is one by three into B, where B is the area of the base into H, where H is the height of the apex. Or you can say H is the height of the pyramid. Now, suppose a tent made of pandas is of the shape of a rectangular pyramid. Now, suppose this is a tent made of pandas, which is in the shape of rectangular pyramid and the base has length three feet, width five feet and height of the tent is now here B. That is the area of the base is equal to the area of the rectangle as the base is rectangular in shape. So, this is equal to L into W, that is the length into width, which is equal to three feet into five feet, which is equal to fifteen square feet is equal to, therefore volume is equal to one by three into area of the base, that is fifteen square feet into height, that is six feet, now three into five is fifteen and five into six is thirty. So, this is equal to thirty cubic feet. So, the volume of the tent is equal to thirty cubic feet, still fact. And that is, we can divide for a pendulumism by taking of the planet FGB GH, to we can find the volume of the prism by finding the sum of the volumes of the three pyramids. We have studied the volumes of prisms and pyramids. And this completes our session. Hope you all have enjoyed the session.