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True/false Two identical solid hemispher...

True/false
Two identical solid hemisphers of equal base radius r cm stuck together along their bases. The total surface are of the combination is `6pir^2`.

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MODERN PUBLICATION-SURFACE AREAS AND VOLUMES-EXERCISE
  1. If the volumes of two spheres are in the ratio 6: 27, find the ratio o...

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  2. True/false Two identical solid cubes of side a are joined end to end. ...

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  3. True/false Two identical solid hemisphers of equal base radius r cm st...

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  4. True/false IF the volumes of two spheres are in the ratio 64:27, then ...

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  5. True/false The largest possible right circular cone is cut out of a cu...

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  6. True/false If a sphere is inscribed in a cube, then the ratio of the v...

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  7. If the length of the diagonal of a cube is 6sqrt3 cm, then the length ...

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  8. True/false For a right circular of base radius 7 cm and height 14 cm, ...

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  9. A metal pipe is 77 cm long. The inner diameter of a cross section is 4...

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  10. True/false In case of a hollwo cylinder. Inner curved surface area of ...

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  11. True/false If total surface of a cube of side is 294cm^3, then a=8cm.

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  12. Fill ups Diagonal of a cuboid dimensions lxxbxxh is …………….. .

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  13. Fill ups The principal diagonal of a cube of edge a is …………….whereas d...

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  14. Fill ups The dimensions of a cuboidal vessel are 100mxx5mxx2m, it can ...

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  15. Fill ups The capacity of a cuboidal tank is 50 kl, if its length and d...

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  16. Fill ups ……………..times the volume of a cone is equal to volume of cylin...

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  17. Fill ups The curved surface area of a hollow cylinder of height h with...

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  18. Fill ups The surface area generated by revolving a bangle about one of...

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  19. Fill ups The number of children each holding an empty cone of radius 2...

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  20. Fill ups The numbre of conical vessels required to empty the completel...

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