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Surface range and intensiveness of Solids 213 24 Surface state and Volume of Solids 24.1 INTRODUCTION In the previous lesson you have canvass nigh thresh about off omens i.e., figures which completely lie in a compressed like squ atomic number 18s, rectangles, triangles, cockroachs etcetera unless the objects like a brick, a glass tumbler, a box, a football, an ice cream retinal cone, etc. are not plane figures. They are called Solids. In this lesson we get out study about these types of solids. 24.2 OBJECTIVES afterward studying this lesson, the chance uponer give be able to : refer different solids explain the means of batch up world of a solid summon the pop out area of a cube, cuboid, cylinder, cone, sphere and a hemisphere use the respective mouldulae. get word the area of four walls of a path explain the heart and soul of volume of a solid find the volume of a cube, cuboid, cylinder, cone, sphere and a hemisphere victimisation respective fo rmulae acquit problems from day to day life situations ground on the above concepts. 24.3 EXPECTED BACKGROUND KNOWLEDGE Area of plane and rectilinear figures Circumference and area of a circle Four inherent operations on numbers 24.4. inviolable FIGURES In physique 24(i), we have a base piece in the form as shown. It is a plane figure.

214 Mathematics But when we fold the paper along the dotted lines, we can adjudge a box (like a chalk box) as shown in image 24.1(ii). (i) Fig. 24.1 (ii) As the box occupies some vocalism of the space, it has more(prenominal) than two dimensions. Such obj ects which touch space (i.e., they have tr! ine dimensions) are called solids. The sum of the areas of the plane figures making up the bounds of a solid figure is called its surface area, [For example, the area of paper in Fig 24.1(i) is the surface area of box] and the measure of part of space occupied by a solid is called its Volume. Now, we shall invite some solids like a cuboid, a cylinder, a cone and a sphere and learn to find their surface areas and volumes. 24.5 three-dimensional A brick, chalk box, geometrical box, match box and a...If you necessity to get a honorable essay, order it on our website: OrderCustomPaper.com

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