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Find the minimum length in cm and correc...

Find the minimum length in cm and correct to nearest whole number of the thin metal sheet required to make a hollow and closed cylindrical box of diameter 20 cm and height 35 cm. Given that the width of the metal sheet is 1 m. Also, find the cost of the sheet at the rate of Rs 56 per sq m.
Find the area of metal sheet required, if 10% of it is wasted in cutting, overlapping, etc.

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The correct Answer is:
28 cm and Rs 15.68;
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ICSE-CYLINDER, CONE AND SPHERE -EXERCISE 20 (A)
  1. The radius of a solid right circular cylinder decreases by 20% and its...

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  2. The radius of a solid right circular cylinder decreases by 20% and its...

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  3. Find the minimum length in cm and correct to nearest whole number of t...

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  4. 3080 cm^(3) of water is required to fill a cylindrical vessel complet...

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  5. 3080 cm^(3) of water is required to fill a cylindrical vessel complet...

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  6. 3080 cm^(3) of water is required to fill a cylindrical vessel complet...

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  7. Find the volume of the largest cylinder formed when a rectangular piec...

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  8. Find the volume of the largest cylinder formed when a rectangular piec...

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  9. A metal cube of side 11 cm is completely submerged in water contained ...

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  10. A circular tank of diameter 2 m is dug and the earth removed is spread...

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  11. The sum of the inner and the outer curved surfaces of a hollow metalli...

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  12. The difference between the outer curved surface area and the inner cur...

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  13. The sum of the height and the radius of a solid cylinder is 35 cm and ...

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  14. The total surface area of a solid cylinder is 616 cm^(2). If the ratio...

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  15. A cylindrical vessel of height 24 cm and diamater 40 cm is full of wat...

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  16. Two solid cylinders, one with diameter 60 cm and height 30 cm and the ...

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  17. The total surface area of a hollow cylinder, which is open from both t...

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  18. The given figure shows a solid formed of a solid cube of side 40 cm an...

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  19. Two right circular solid cylinders have radii in the ratio 3 : 5 and h...

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  20. Two right circular solid cylinders have radii in the ratio 3 : 5 and h...

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