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Some plastic balls of radius 1 cm were m...

Some plastic balls of radius 1 cm were melted and cast into a tube. The thickness, length and outer radius of the tube were 2 cm, 90 cm, and 30 cm respectively. How many balls were melted to make the tube?

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`= 7830`
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TARGET PUBLICATION-MENSURATION-Problem Set -7
  1. The ratio of circumference and area of a circle is 2:7. Find its circu...

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  2. If measure of an arc of circle is 160^@ and its length is 44 cm, find ...

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  3. Find the perimeter of a sector of a circle if its measure is 90^@ and ...

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  4. Find the curved surface area of a cone of radius 7 cm and height 24 cm...

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  5. The curved surface area of a cylinder is 440cm^2 and its radius is 5 c...

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  6. A cone was melted and cast into a cylinder of the same radius as that ...

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  7. Find the volume of a cube of side 0.01 cm.

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  8. Find the side of a cube of volume 1 m^(3).

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  9. A washing tub in the shape of a frustum of a cone has height 21 cm. Th...

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  10. Some plastic balls of radius 1 cm were melted and cast into a tube. Th...

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  11. A metal parallelopiped of measure 16 cm times 11 cm times 10 cm was me...

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  12. The diameter and length of a roller is 120 cm and 84 cm respectively. ...

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  13. The diameter and thickness of a hollow metallic sphere are 12 cm and 0...

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  14. A cylinder bucket of diameter 28 cm and height 20 cm was full of sand....

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  15. The radius of a metallic sphere is 9 cm. It was melted to make a wire ...

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  16. The area of a sector of a circle of 6 cm radius is 15pi sq. cm. Find t...

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  17. In the adjoining figure, seg AB is a chord of a circle with centre P. ...

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