Surface Areas And Volumes | One Shot | Class 9 Maths
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- เผยแพร่เมื่อ 6 ก.พ. 2025
- Sample Paper : amzn.to/3tx6GO5
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Quick Revision
1. Curved surface area of a cone=πrl
2. Total surface area of a right circular cone= πr(L+r)
3. Surface area of a sphere of radius r = 4pi * r ^ 2
4. Curved surface area of a hemisphere = 2pi * r ^ 2
5. Total surface area of a hemisphere = 3
6. Volume of a cone = 1/3 * pi * r ^ 2 * h
7. Volume of a sphere of radius r = 4/3 * pi * r ^ 3
8. Volume of a hemisphere =2/3πr^3
Thank you so much 😊
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Thanks
Ty❤
Total surface area of a hemisphere isn't equal to 3...
More like 3πr^2
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Mam can u upload video on areas of parallelograms and triangles 😢 plz plz plz mam
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Pls make more videos like this for other chapter
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Quick Revision
1. Curved surface area of a cone=πrl
2. Total surface area of a right circular cone= πr(L+r)
3. Surface area of a sphere of radius r = 4pi * r ^ 2
4. Curved surface area of a hemisphere = 2pi * r ^ 2
5. Total surface area of a hemisphere = 3
6. Volume of a cone = 1/3 * pi * r ^ 2 * h
7. Volume of a sphere of radius r = 4/3 * pi * r ^ 3
8. Volume of a hemisphere =2/3πr^3
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Mam please make videos on exercises of this chapter
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That one explaination of lemon 🌚😂 8:33 to 8:40
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Mam pls make areas of parallelogram and triangles pls mam its very imp chapter...😢vote for areas of parallelogram and triangle
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Answer
Spair nhi sphere
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100th comments
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