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The radius of a spherical balloon increa...

The radius of a spherical balloon increases from 6 cm to 12 cm. Compare the surface areas of the balloon in the two cases.

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MBD-Surface Areas and Volumes-Exercise
  1. Find the surface area of sphere whose radius is 3 cm.

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  2. Find the surface area of a sphere whose diameter is 21 dm.

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  3. The radius of a spherical balloon increases from 6 cm to 12 cm. Compar...

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  4. The dome of a building is in the form of a hemisphere. Its radius is 6...

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  5. Assuming the earth to be a sphere of radius 6370 km, how many square k...

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  6. A wooden toy is in the form of a cone surmounted by a hemisphere. The ...

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  7. A matchbox 4 cm x 2.5 cm x 1.5 cm. What will be the volume a packet co...

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  8. A cuboidal water tank is 6 m long, 5 m wide and 4.5 m deep. How many l...

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  9. A cuboidal vessel is 10 m long and 8 m wide. How high must it be made ...

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  10. Find the cost of digging a cuboidal pit 8 m long, 6 m broad and 3 m de...

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  11. The capacity of a cuboidal tank is 50000 litres of water. Find the bre...

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  12. A village, having a population of 4000, requires 150 litres of water p...

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  13. A godown measures 40 m xx 25 m xx 15 m. Find the maximum number of woo...

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  14. Find the minimum number of bricks each measuring 22.5 cm xx 11.5 cm xx...

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  15. A solid cube of side 12 cm is cut into eight cubes of equal volume. Wh...

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  16. A river 3 m deep and 40 m wide is flowing at the rate of 2 km per hour...

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  17. Find the length of a wooden plank of width 2.5 m, thickness 0.025m and...

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  18. The rainfall on a certain day was 6 cm. How many litres of water fell ...

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  19. A solid rectangular piece of iron measures 2.5 m by 1.2 m by 1 cm. Fin...

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  20. The dimensions of a metal block are 4.5 m by 1.5 m by 27 m. It is melt...

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