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Class 9 | Chapter 13 | Surface areas and Volumes | Example 17
Example 17: Find the volume of a sphere of radius 11.2 cm. Example 16 Example 18
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Class 9 | Chapter 13 | Surface areas and Volumes | Example 15
Example 15: The height and the slant height of a cone are 21 cm and 28 cm respectively. Find the volume of the cone. Example 14 Example 16
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Class 9 | Chapter 13 | Surface areas and Volumes | Example 14
Example 14: At a Ramzan Mela, a stall keeper in one of the food stalls has a large cylindrical vessel of base radius 15 cm filled up to a height of 32 cm with orange juice. The juice is filled…
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09
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Class 9 | Chapter 13 | Surface areas and Volumes | Example 13
Example 13: The pillars of a temple are cylindrically shaped (see Fig. 13.26). If each pillar has a circular base of radius 20 cm and height 10 m, how much concrete mixture would be required to build 14 such pillars?…
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09
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Class 9 | Chapter 13 | Surface areas and Volumes | Example 11
Example 11: A wall of length 10 m was to be built across an open ground. The height of the wall is 4 m and thickness of the wall is 24 cm. If this wall is to be built up…
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09
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Class 9 | Chapter 13 | Surface areas and Volumes | Example 10
Example 10: A hemispherical dome of a building needs to be painted (see Fig. 13.21). If the circumference of the base of the dome is 17.6 m, find the cost of painting it, given the cost of painting is `…
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09
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Class 9 | Chapter 13 | Surface areas and Volumes | Example 9
Example 9: The hollow sphere, in which the circus motorcyclist performs his stunts, has a diameter of 7 m. Find the area available to the motorcyclist for riding. Example 8 Example 10
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Class 9 | Chapter 13 | Surface areas and Volumes | Example 8
Example 8: Find (i) the curved surface area and (ii) the total surface area of a hemisphere of radius 21 cm. Example 7 Example 9
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Class 9 | Chapter 13 | Surface areas and Volumes | Example 7
Example 7: Find the surface area of a sphere of radius 7 cm. Example 6 Example 8
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Class 9 | Chapter 13 | Surface areas and Volumes | Example 6
Example 6: A corn cob (see Fig. 13.17), shaped somewhat like a cone, has the radius of its broadest end as 2.1 cm and length (height) as 20 cm. If each 1 cm2 of the surface of the cob carries…
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