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The radius of a wire is decreased to one...

The radius of a wire is decreased to one third. If volume remains the same, the length will become

A

3 times

B

6 times

C

9 times

D

27 times

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MODERN PUBLICATION-SURFACE AREAS AND VOLUMES-EXERCISE
  1. The height h of a cylinder equal the circumference of the cylinder. In...

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  2. Two steel sheets each of length a1 and breadth a2 are used to prepare ...

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  3. The radius of a wire is decreased to one third. If volume remains the ...

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  4. The height of a cone is 21 cm and its slant height is 28 cm. the volum...

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  5. If the volumes of two cones be in the ratio 1:4 and the radii of their...

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  6. The ratio of the volumes of a right circular cylinder and a right circ...

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  7. If the height and the radius of a cone are doubled, he volume of the c...

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  8. The volume of a sphere of radius 10.5 cm is

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  9. The volume of a sphere is 38808 cm^3. Its curved surface area is

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  10. The radius of a hemispheircal balloon increases from 6 cm to 2 cm is a...

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  11. A hemispherical bowl of internal radius 9 cm is full of liquid. This ...

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  12. A cone and a hemispher have equal bases and equal volumes. Find the ra...

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  13. The radius of a sphere is 2r. Then its volume will be

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  14. The total surface area of a cube is 96cm^2. The volume of the cube is

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  15. A cone is 8.4 cm high and the radius of its base is 2.1 cm. It is melt...

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  16. In a cylinder radius is doubled and height is halved, curved surface a...

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  17. The total surface area of a cone whose radius is r/2 and slant height ...

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  18. Base radius of two cylinder are in the ratio 2 : 3 and their heights a...

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  19. The lateral surface area of a cube is 256cm^2. The volume of the cube ...

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  20. The number of planks of dimensions (4mxx50mxx20cm) that can be stored ...

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