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From a rectangular solid of metal 42 cm ...

From a rectangular solid of metal 42 cm by 30 cm by 20 cm, a conical cavity of diameter 14 cm and depth 24 cm is drilled out. Find :
the weight of the material drilled out if it weighs 7 gm per `cm^(3).`

Text Solution

Verified by Experts

The correct Answer is:
(i) 5796 `cm^(2)` (ii) 23968 `cm^(3)`(iii) 8.624 kg
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NAGEEN PRAKASHAN ENGLISH-VOLUME AND SURFACE AREA OF SOLIDS-Exercise
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  8. Three metal cubes with edges 6cm , 8cm and 10cm respectively are melte...

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  9. Six cubes each of side 12 cm are joined end to end .Find the surface a...

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  10. 2 cubes each of volume 64"\ "c m^3 are joined end to end. Find the ...

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  11. 40 circular plates each of radius 7 cm and thickness 1.5 cm are placed...

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  12. A right circular cone is 8 cm high and radius of its base is 2 cm .The...

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  13. A girl fills a cylindrical bucket 32 cm in height and 18 cm in radius ...

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  14. The volume of a sphere is (4pi)/(3) cm^(3).Find the volume of that cub...

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  15. A cone of height 4 cm is melted and recast into a sphere of diameter 8...

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  16. A metallic sphere of radius 7 cm is melted and recast in to right circ...

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  17. The height and base radius of a metallic cone are 216 cm and 16 cm res...

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  18. The base diameter and height of a metallic cone are 24cm and 6cm respe...

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  19. (a) Three metallic spherical balls of radii 3 cm , 4cm and 5 cm are me...

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  20. (a) How many balls of radius 1 cm can be drawn by melting metallic sph...

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