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Find the surface area of a sphere of rad...

Find the surface area of a sphere of radius 7cm.

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RD SHARMA ENGLISH-SURFACE AREA AND VOLUME OF A SPHERE -All Questions
  1. If the radius of a sphere is doubled, what is the ratio of the volu...

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  2. A spherical ball of lead 3cm in diameter is melted and recast into t...

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  3. Find the surface area of a sphere of radius 7cm.

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  4. Find the total surface area of a hemisphere of radius 21cm.

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  5. The radius of a spherical balloon increases from 7cm to 14cm as air is...

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  6. A sphere, a cylinder and a cone are of the same radius and same hei...

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  7. Show that the surface area of a sphere is the same as that of the l...

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  8. A right circular cylinder just encloses a sphere of radius r as sho...

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  9. A hemispherical bowl is made of steel, 0.25 cm thick. The inner rad...

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  10. The internal and external diameters of a hollow hemispherical vesse...

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  11. The internal and external diameters of a hollow hemispherical vesse...

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  12. A storage tank consists of a circular cylinder with a hemisphere ad...

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  13. A toy is in the shape of a right circular cylinder with a hemispher...

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  14. A wooden toy is in the form of a cone surmounted on a hemisphere. T...

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  15. The diameter of a sphere is decreased by 25%. By what per cent does...

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  16. Find the surface area of a sphere of radius: 10.5 cm         (ii...

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  17. Find the surface area of a sphere of diameter: (i) 14 cm (ii) 21 cm (i...

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  18. Find the total surface area of a hemisphere of radius 10 cm

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  19. The surface area of a sphere is 5544\ c m^2, find its diameter.

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  20. A hemispherical bowl made of brass has inner diameter 10.5cm. Find ...

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