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A solid metal ball of radius 8 cm is mel...

A solid metal ball of radius 8 cm is melted and cast into smaller balls, each of radius 2 cm. The number of such balls is

A

8

B

16

C

32

D

64

Text Solution

Verified by Experts

The correct Answer is:
D
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RS AGGARWAL-VOLUME AND SURFACE AREA OF SOLIDS-Multiple Choice Questions (Mcq)
  1. The volume of a sphere of radius 10.5 cm is

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  2. The surface area of a sphere of radius 21 cm is

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  3. The surface area of a sphere is 1386 cm^(2). Its volume is

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  4. If the surface area of a sphere is (144 pi)m^(2) then its volume is

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  5. The volume of a sphere is 38808 cm^(3). Its curved surface area is

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  6. If the ratio of the volumes of two spheres is 1 : 8 then the ratio of ...

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  7. A solid metal ball of radius 8 cm is melted and cast into smaller ball...

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  8. A cone is 8.4 cm heigh and the radius of its base is 2.1 cm. It is mel...

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  9. A solid lead ball of radius 6 cm is melted and then drawn into a wire ...

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  10. A metallic sphere of radius 10.5 cm is melted and then react into smal...

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  11. How many lead shots, each 0.3 cm in diameter, can be made from a cuboi...

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  12. The diameter of a sphere is 6 cm. It is melted and drawn into a wire o...

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  13. A sphere of diameter 12.6 cm is melted and cast into a right circular ...

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  14. A spherical ball of radius 3 cm is melted and recast into three spheri...

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  15. The radius of hemispherical balloon increases from 6 cm to 12 cm as ai...

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  16. The volumes of two spheres are in the ratio 64 : 27 and the sum of the...

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  17. A hemispherical bowl of radius 9 cm contains a liquid. This liquid is ...

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  18. A cone and a hemisphere have equal bases and equal volumes. The ratio ...

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  19. A cone, a hemisphere and a cylinder stand on equal bases and have th...

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  20. If the volume and surface area of a sphere are numerically the same, t...

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