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If three metallic spheres of radii 6 c...

If three metallic spheres of radii 6 cm, 8 cm and 10 cm are melted to form a single sphere, the diameter of the sphere is
(a) 12 cm   
(b) 24 cm   
(c) 30 cm    
(d) 36 cm

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RD SHARMA ENGLISH-SURFACE AREAS AND VOLUMES-All Questions
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  2. The volumes of two spheres are in the ratio of 64 : 27. The ratio o...

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  3. If three metallic spheres of radii 6 cm, 8 cm and 10 cm are melted t...

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  4. The surface area of a sphere is same as the curved surface area of ...

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  5. The volume of the greatest sphere that can be cut off from a cylindr...

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  6. A cylindrical vessel of radius 4 cm contains water. A solid sphere ...

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  7. 12 spheres of the same size are made from melting a solid cylinder o...

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  8. A solid metallic spherical ball of diameter 6 cm is melted and reca...

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  9. A hollow sphere of internal and external diameters 4 cm and 8 cm re...

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  10. A solid piece of iron of dimensions 49xx33xx24 cm is moulded int...

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  11. The ratio of lateral surface area to the total surface area of a cyl...

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  12. A solid consists of a circular cylinder with an exact fitting right...

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  13. Find the maximum volume of a cone that can be carved out of a solid ...

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  14. The radii of the bases of two cylinders are in the ratio 3 : 5 and ...

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  15. A right circular cylinder of radius r and height h\ (h gt 2r) just ...

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  16. The radii of the circular ends of a frustum are 6 cm and 14 cm. If i...

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  17. The height and radius of the cone of which the frustum is a part are...

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  18. The diameters of the ends of a frustum of a cone are 32 cm and 20 cm...

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  19. A solid frustum is of height 8 cm. If the radii of its lower and upp...

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  20. The radii of the ends of a bucket 16 cm high are 20 cm and 8 cm. Th...

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