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The radius of a spherical balloon increa...

The radius of a spherical balloon increases from 14 cm to 35 cm as air is pumped into it. Find the ratio of surface areas of the balloon in these two cases.

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KUMAR PRAKASHAN-SURFACE AREAS AND VOLUMES-SKILL TESTING EXERCISE
  1. The total surface area of a hemisphere is 4158 cm^(2). Find its diamet...

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  2. The diameter of a hollow hemispherical lid is 7 m. Find the cost of pa...

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  3. The radius of a spherical balloon increases from 14 cm to 35 cm as air...

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  4. A cuboidal tank measures 8 m times 6 m times 5 m. Find its volume. How...

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  5. The length and breadth of a cuboidal pit are 8 m and 6 m respectively....

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  6. The capacity of a cuboidal water tank is 1,00,000 litres. If its lengt...

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  7. A colour box measures 12 cm times 6 cm times 4 cm. Find the volume of ...

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  8. The population of a village is 10,000. The daily requirement of water ...

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  9. A cuboidal pit measuring 5 m times 5 mtimes 20 m is dug and the earth ...

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  10. The area of the base of a cylinder is 40 cm^(2) and its height is 10 c...

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  11. The radius and height of a cylindrical cistern are 1.4 m and 2 m respe...

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  12. The curved surface area of a cylinder is 88 cm^(2). If the height of t...

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  13. The capacity of a cylindrical vessel is 69,300 cm^(3). If the diameter...

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  14. The diameter and height of a cylinderical plate are 14 cm and 2 cm res...

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  15. The curved surface area of a cylindrical pillar is 440 m^(2) and its v...

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  16. The radius of the base of a cone is 14 cm and its height is 15 cm. Fin...

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  17. The cuved surface area of a cone is 550 cm^(2). If the diameter of the...

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  18. The circumference of the base of a cone is 44 cm. If its height is 9 c...

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  19. The radius and slant height of a cone are 21 cm and 35 cm respectively...

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  20. A conical vessel with radius 10 cm and height 15 cm is completely fill...

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