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A rectangular sheet of paper 40 cm xx 22...

A rectangular sheet of paper `40 cm xx 22 cm` is rolled to form a hollow cylinder of height 40 cm. The radius of the cylinder ( in cm ) is ………… .

A

3.5 cm

B

7 cm

C

`80/7 cm`

D

5 cm

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The correct Answer is:
A
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FULL MARKS-MENSURATION -ADDITIONAL QUESTIONS SOLVED
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  2. If the diameter and height of a right circular cone are 12 cm and 8 cm...

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  3. If the circumference at the base of a right circular cone and the slan...

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  4. If the volume and the base area of a right circular cone are 48picm^(3...

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  5. If the height and the base area of a right circular cone are 5cm and 4...

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  6. The ratios of the respective height and the respective radii of two cy...

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  7. If the radius of a sphere is 2cm, then the curved surface area of the ...

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  8. The total surface area of a solid hemisphere of diameter 2cm is equal ...

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  9. If the volume of a sphere is 9/6 pi cu.cm then its radius is ……… .

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  10. The surface area of two sphere are in the ratio of 9:25 then their vol...

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  11. The total surface area of a solid hemisphere whose radius is a units, ...

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  12. If the surface area of a sphere is 100picm^(2), then its radius is equ...

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  13. If the surface area of a sphere is 36pi cm^(2), then the volume of the...

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  14. If the total surface area of a solid hemisphere is 12pi cm^(2) then it...

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  15. If the radius of a sphere is half of the radius of another sphere, the...

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  16. Curved surface area of a solid sphere is 24cm^(2). If the the sphere i...

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  17. Two right circular cones have equal radii. If their slant height are i...

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  18. If a rectangle of length 8 cm breadth 4 cm is folded by bringing their...

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  19. The number of solid spheres, each of diameter 6 cm that can be made by...

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  20. A rectangular sheet of paper 40 cm xx 22 cm is rolled to form a hollow...

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