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If the volume of a hollow iron-sphere o...

If the volume of a hollow iron-sphere of thickness 3 cm be `490(2)/(7)`cc , then find the external radius of the sphere.

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CALCUTTA BOOK HOUSE-SPHERE-EXERCISE
  1. The diameter of a hemisphere iron-ball is 42 d cm . Calculate the cost...

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  2. If a solid large sphere is made by melting three small gold-sphere of ...

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  3. If the radius of a sphere be doubled, then what percent of its whole s...

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  4. How many smaller sphere of diameter 1 cm will be got by meltin a soli...

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  5. If a solid metal-sphere id made by melting two metal hemisphere of dia...

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  6. If the radius of a sphere be decreased by 10%, then what percent of it...

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  7. Calculate the whole surface area of a hemisphere metal bowl of interna...

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  8. If the ratio of the volume and the whole surface area of a solid spher...

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  9. If the external dimeter of a hollow iron-sphere be 12cm and the thickn...

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  10. If three smaller sphrer are made by melting a solid metal sphere of r...

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  11. Three smaller circular balls are made by melting a copper spherical ba...

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  12. How many metal sphere of radius 5 mm can be made by melting a metal s...

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  13. 6.4 litres and 21.6 liters of water can be put into two hemisphere pot...

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  14. The ratio of the volumes of two spheres is 64:27. If the sum of their ...

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  15. The internal and external diameters of a semicircular hollow sphere ar...

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  16. The mass of a hollow iron-sphere of external radius 21cm is 22775(5)/(...

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  17. The external and interenal diameter of a hollow metal spheres are 12c...

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  18. If the volume of a hollow iron-sphere of thickness 3 cm be 490(2)/(7)...

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  19. If the radius of a sphere be decreased by 20%,then what percent of its...

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  20. A hollow sphere of external radius 5 cm and of same thickness is made...

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