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How many cubic metres of earth must be d...

How many cubic metres of earth must be dug out to sink a well 14 m deep and 4 m in diameter? What will it cost to plaster its inner surface at Rs 2.50 per square metre?

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MODERN PUBLICATION-SURFACE AREAS AND VOLUMES-EXERCISE
  1. The curved surface area of a cylindrical pillar is 264 m^2 and its v...

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  2. Find the weight of a lead pipe 3.5 m long. The external diameter of pi...

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  3. How many cubic metres of earth must be dug out to sink a well 14 m dee...

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  4. A powder tin has a square base with side 12 cm and height 17.5 cm. ano...

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  5. A copper rod of diameter 1 cm and length 8 cm is drawn into a wire of ...

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  6. The trunk of a tree is cylindrical and its circumference is 176 cm. If...

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  7. Water flows out through a circular pipe whose internal diameter is 2 c...

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  8. From a top of inner radius 0.75 cm, water flows at the rate of 7 m per...

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  9. A well of diameter 2 m is dug 14 m deep. The earth taken out of it is ...

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  10. A rectangular sheet of paper 30cmx×18cm can be transformed into the cu...

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  11. The barrel of a fountain-pen, cylindrical in shape, is 7 cm long and 5...

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  12. Water is flowing at the rate of 3km/h through a circular pipe of 20 cm...

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  13. A cylindrical water tank of diameter 1.4 m and height 2.1 m is being f...

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  14. Find the curved area of a cone, if its slant height is 60 cm and the r...

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  15. The radius of a cone is 7 cm and area of curved surface is 176cm^2. Fi...

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  16. The radius of a cone is 5 cm and vertical height is 12 cm. find the ar...

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  17. find the total surface area of a right circular cone with radius 6 cm ...

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  18. The height of a cone is 21 cm. find the area of the base if the slant ...

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  19. The radius of the slant height of a cone are in the ratio of 4:7. if i...

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  20. The area of the curved surface of a cone is 60 picm^2. If the slant he...

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