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A 20m deep well with diameter 7m is dug ...

A 20m deep well with diameter 7m is dug and the earth from digging is evenly spread out to from a platform 22m by 14m.Find the height of the platform.

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A 20 m deep well with diameter 7 m is dug and the earth from digging is evenly spread out to form a platform 22 m by 14 m. Find the height of the platform.

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R G PUBLICATION-SURFACE AREA AND VOLUMES-EXERCISE
  1. A metallic sphere of radius 4.2 cm is melted and recast into the shape...

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  2. Metallic sphere of radii 6 cm,8 cm and 10 cm respectively are melted t...

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  3. A 20m deep well with diameter 7m is dug and the earth from digging is ...

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  4. A well of diameter 3 m is dug 14 m deep.The earth take out of its has ...

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  5. A container shaped like a right circular cylinder having diameter 12 c...

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  6. How many silver coins 1.75 cm in diameter and of thickness 2mm,must be...

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  7. A cylinder bucket,32 cm high and with radius of base 18 cm,is filled w...

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  8. Water in a canal,6 m wide and 1.5 m deep,is flowing with a speed of 10...

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  9. A farmer connects a pipe of internal diameter 20cm from a canal into a...

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  10. A drinking glass is in the shape of a frustum of a cone height 14 cm.T...

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  11. The slant height of a frustum of a cone 4 cm and the perimeters(circum...

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  12. A fez,the cap used by the Turks,is shaped like the frustum of a cone ...

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  13. A copper wire,3 mm in diameter, is wound about a cylinder whose length...

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  14. A right triangle whose sides are 3 cm and 4 am (other than hypotenuse)...

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  15. In one fortnight of a given month,there was a rainfall of 10 cm in a r...

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  16. An oil funnel made of tin sheet consists of a 10cm long cylindrical po...

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  17. The surface area of a sphere is 616cm^2.Find its radius.

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  18. A cylinder,a cone and a hemisphere are of equal base and have the same...

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  19. A cylinder and a cone are of the same base radius and of some height.F...

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  20. A sphere and a cube have equal surface areas.What is the ratio of the ...

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