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A metallic sphere of radius 4.2 cm is me...

A metallic sphere of radius 4.2 cm is melted and recast into the shape of a cylinder of radius 6 cm.Find the height of the cylinder.

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R G PUBLICATION-SURFACE AREA AND VOLUMES-EXERCISE
  1. A solid consisting of a right circular cone of height 120cm and radius...

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  2. A spherical glass vessel has a cylindrical neck 8 cm long,2 cm in diam...

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  3. A metallic sphere of radius 4.2 cm is melted and recast into the shape...

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  4. Metallic sphere of radii 6 cm,8 cm and 10 cm respectively are melted t...

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  5. A 20m deep well with diameter 7m is dug and the earth from digging is ...

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  6. A well of diameter 3 m is dug 14 m deep.The earth take out of its has ...

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  7. A container shaped like a right circular cylinder having diameter 12 c...

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  8. How many silver coins 1.75 cm in diameter and of thickness 2mm,must be...

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  9. A cylinder bucket,32 cm high and with radius of base 18 cm,is filled w...

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  10. Water in a canal,6 m wide and 1.5 m deep,is flowing with a speed of 10...

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  11. A farmer connects a pipe of internal diameter 20cm from a canal into a...

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  12. A drinking glass is in the shape of a frustum of a cone height 14 cm.T...

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  13. The slant height of a frustum of a cone 4 cm and the perimeters(circum...

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  14. A fez,the cap used by the Turks,is shaped like the frustum of a cone ...

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  15. A copper wire,3 mm in diameter, is wound about a cylinder whose length...

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  16. A right triangle whose sides are 3 cm and 4 am (other than hypotenuse)...

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  17. In one fortnight of a given month,there was a rainfall of 10 cm in a r...

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  18. An oil funnel made of tin sheet consists of a 10cm long cylindrical po...

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  19. The surface area of a sphere is 616cm^2.Find its radius.

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  20. A cylinder,a cone and a hemisphere are of equal base and have the same...

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