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A solid piece of iron of dimensions 4...

A solid piece of iron of dimensions `49xx33xx24` cm is moulded into a sphere. The radius of the sphere is (a) 21 cm (b) 28 cm (c) 35 cm (d) None of these

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RD SHARMA ENGLISH-SURFACE AREAS AND VOLUMES-All Questions
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  4. A solid piece of iron of dimensions 49xx33xx24 cm is moulded int...

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

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

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

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

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

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

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  15. The diameters of the top and the bottom portions of a bucket are 42 cm...

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  16. If four times the sum of the areas of two circular faces of a cylin...

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  17. If the radius of the base of a right circular cylinder is halved, k...

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  18. A metallic solid cone is melted to form a solid cylinder of equal r...

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  19. A rectangular sheet of paper 40 c mxx22 c m , is rolled to form ...

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