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The diameter of a roller 1.5 m long is 84 cm. If it takes 100 revolutions to level a playground, find the cost of levelling this ground at the rate of 50 paise per square meter.

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MODERN PUBLICATION-SURFACE AREAS AND VOLUMES-EXERCISE
  1. Find the ratio between the total surface area of a cylinder to its cur...

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  2. The total surface area of a hollow metal cylinder, open at both ends, ...

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  3. The diameter of a roller 1.5 m long is 84 cm. If it takes 100 revoluti...

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  4. A cylindrical vessel, without lid, has to be tin-coated on its both si...

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  5. 50 circular plates each of radius 7 cm and 1 thickness 1/2 cm are plac...

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  6. The area of the curved surface of a cylinder is 4400 sq.cm and the cir...

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  7. Forty cylindrical pillars of the building are to be cleaned. If the di...

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  8. Find the cost of sinking tube well 280 m deep having diameter 3 m at t...

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  9. The diameter of a cylindrical well is 4.5 m and depth of the well is 1...

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  10. Find the volume of a right circular cylinder of height 21 cm and base ...

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  11. The diameter of a cylinder is 28 cm and its height is 40 cm. find the ...

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  12. The area of the curved surface of a cylinder is 4400 sq.cm and the cir...

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  13. The sum of the radius of the base and the height of a solid cylinder i...

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  14. The ratio between curved surface area and total surface area of right ...

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  15. The radii of two cylinders are in the ratio 2:3 and their heights are ...

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  16. The ratio between the radius of the base and the height of cylindrical...

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  17. The curved surface area of a cylindrical pillar is 264 m^2 and its v...

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

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

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

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