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If diameter of a sphere is decreased by 25% then what percent does its curved surface area decrease ?

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MODERN PUBLICATION-SURFACE AREAS AND VOLUMES-EXERCISE
  1. The surface area of a sphere is 5544cm^2 find diameter.

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  2. The diameter of the moon is approximately one fourth the diamter of th...

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  3. If diameter of a sphere is decreased by 25% then what percent does its...

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

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  5. Assuming the earth to be a sphere of radius 6370 km, how many square k...

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  6. The radius of a spherical balloon increases from 6 cm to 12 cm. Compar...

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  7. A dome of a building is in the form of a hemisphere. From inside, it w...

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  8. A toy is in the form of a cone mounted on a hemisphere of radius 3.5 c...

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  9. The internal and external diameters of a hollow hemispherical vessel a...

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  10. Find the volume of a sphere whose radius is : 3.5 cm.

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  11. Find the volume of a sphere whose radius is 5 m

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  12. Find the surface area of a sphere whose volume is 4851cm^3.

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  13. The volume of a sphere is 38808 cm^3. Find its radius and hence its su...

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  14. The surface area of a sphere is 576picm^2. Find its volume.

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  15. A hemspherical tank has inner radius of 2.8 m. find its capacity in li...

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  16. If the radius of a sphere is doubled, what is the ratio of the volume ...

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  17. A hemspherical tank has inner radius of 2.8 m. find its capacity in li...

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  18. If the radius of a sphere is doubled, what is the ratio of the volume ...

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  19. A hemisphere of a lead of radius 7 cm is cast into a right circular co...

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  20. The outer diameter of a spheircal shell is 10 cm and the inner diamete...

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