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A solid sphere of radius r melted and re...

A solid sphere of radius r melted and recast into the shape of a solid cone of height r, then radius of the base of the cone is (of equal volume)

A

2r

B

r

C

3r

D

4r

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BEYOND PUBLICATION-MENSURATION-EXERCISE
  1. Volume of is cuboid

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  2. The diameter of a metallic sphere is 6 cm and melted to draw a wire of...

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  3. A solid sphere of radius r melted and recast into the shape of a solid...

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  4. If the radii of circular ends of a frustum of a cone are 20 cm and 12 ...

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  5. The number of balls, each of radius 1 cm that can be made from a solid...

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  6. The ratio of volume of two cones is 4:5 and the ratio of the radii of ...

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  7. If the ratio of radii of two spheres is 2:3 then the ratio of their su...

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  8. If a cone is cut into two parts by a horizontal plane passing through ...

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  9. The height of a cylinder is doubled and radius is tripled then its cur...

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  10. Diameter of a sphere which can inscribe a cube of edge x cm is ….

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  11. Total surface area of hemisphere of radius r is ……………

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  12. Volume of a frustrum of a cone is …….

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  13. If the length of each diagonal of a cube is doubled, then its volume b...

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  14. If a right angled triangle is revolved about its hypotenuse then it wi...

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  15. A solid sphere of radius 10 cm is moulded into 8 spherical solid balls...

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  16. In a hollow cuboid box of size 4 times 3 times 2 m, the number of soli...

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  17. If the external and internal radii of a hollow hemispherical bowl are ...

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  18. Volume of cylinder is ……… cu. units.

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  19. Volume of cone is …… cu. units.

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  20. Volume ofsphere is ….. cu. units.

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