11
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11
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09
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Class 9 | Chapter 13 | Surface areas and Volumes | Example 16
Example 16: Monica has a piece of canvas whose area is 551 m2. She uses it to have a conical tent made, with a base radius of 7 m. Assuming that all the stitching margins and the wastage incurred while…
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09
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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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09
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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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09
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Class 9 | Chapter 13 | Surface areas and Volumes | Example 5
Example 5: The height of a cone is 16 cm and its base radius is 12 cm. Find the curved surface area and the total surface area of the cone (Use π = 3.14). Example 4 Example 6
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09
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Class 9 | Chapter 13 | Surface areas and Volumes | Example 4
Example 4: Find the curved surface area of a right circular cone whose slant height is 10 cm and base radius is 7 cm. Example 3 Example 5
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09
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Class 9 | Chapter 13 | Surface areas and Volumes | Exercise 13.7 | Question 9
Question 9: A heap of wheat is in the form of a cone whose diameter is 10.5 m and height is 3 m. Find its volume. The heap is to be covered by canvas to protect it from rain. Find…
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09
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Class 9 | Chapter 13 | Surface areas and Volumes | Exercise 13.7 | Question 8
Question 8: If the triangle ABC in the Question 7 above is revolved about the side 5 cm, then find the volume of the solid so obtained. Find also the ratio of the volumes of the two solids obtained in…
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09
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Class 9 | Chapter 13 | Surface areas and Volumes | Exercise 13.7 | Question 7
Question 7: A right triangle ABC with sides 5 cm, 12 cm and 13 cm is revolved about the side 12 cm. Find the volume of the solid so obtained. Question 6 Question 8
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