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A well 20 m in diameter is dug 14 m deep...

A well 20 m in diameter is dug 14 m deep and the earth taken out is spread all round it to a width of 5 m to form an embankment. The height of the embankment is

A

10 m

B

11 m

C

`11.2` m

D

`11.5` m

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The correct Answer is:
C
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S CHAND IIT JEE FOUNDATION-VOLUME AND SURFACE AREA -Section B (Question Bank - 27)
  1. The number of coins of radius 0.75 cm and thickness 0.2 cm to be melte...

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  2. A hollow iron pipe of 21 cm long and its external diameter is 8 cm. If...

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  3. A well 20 m in diameter is dug 14 m deep and the earth taken out is sp...

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  4. The height of a right circular cylinder is 6 m. If three times the ...

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  5. The ratio of the radii of two cylinders is 1:sqrt(3) and their heights...

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  6. If the radius of a right circular cylinder is decreased by 50% and its...

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  7. The radii of the bases of two cylinders are in the ratio 3 : 5 and ...

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  8. The diameter of the base of a cylindrical drum is 35 dm and its height...

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  9. If the diameter of a wire is decreased by 10% by how much per cent app...

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  10. The radius of a cylindrical cistern is 10 metres and its height is ...

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  11. The volume of a right circular cylinder can be obtained from its curve...

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  12. If the radius of a right circular cylinder open at both the ends is de...

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  13. It is required to fix a pipe such that water flowing through it at ...

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  14. A rectangular piece of paper is 24 cm long and 22 cm wide. A cylinder ...

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  15. A hollow right circular cylinder with height 8 cm and base radius 7 cm...

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  16. The magnitude of the volume of a closed right circular cylinder of uni...

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  17. A hollow cylindrical tube 20 cm long is made of iron and its external ...

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  18. What length of solid cylinder 2 cm in diameter must be taken to cas...

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  19. The volume of two cylinders are as a : b and their heights are c : d F...

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  20. The inner diameter of a circular building is 54 cm and the base of the...

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