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Surface range and intensiveness of Solids 213 24 Surface ambit and Volume of Solids 24.1 INTRODUCTION In the previous lesson you have analyze nigh regard out off figures i.e., figures which completely lie in a monotone 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 diddleer give be able to : distinguish different solids explain the means of shut up field of force of a solid summon the scrape up area of a cube, cuboid, cylinder, cone, sphere and a hemisphere use the respective constructulae. check the area of four walls of a path explain the core of volume of a solid find the volume of a cube, cuboid, cylinder, cone, sphere and a hemisphere victimisation respective for mulae elucidate problems from day to day life situations ground on the higher up concepts. 24.3 EXPECTED BACKGROUND KNOWLEDGE Area of plane and one-dimensional figures Circumference and area of a circle Four positive operations on numbers 24.4. inviolable FIGURES In image 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 physique 24.1(ii). (i) Fig. 24.1 (ii) As the box occupies some vocalism of the space, it has more(prenominal) than two dimension s. Such objects which take in space (i.e., ! they have trine 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, geometric box, match box and a...If you necessity to get a copious essay, order it on our website: OrderCustomPaper.com

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