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When 'h' coins each of radius 'r' unit a...

When 'h' coins each of radius 'r' unit and thickness 1 unit is stacked one upon the other, what would be the solid object you get? Also find its C.S.A.

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The correct Answer is:
`2pirh sq. units`
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PREMIERS PUBLISHERS-MENSURATION-SOLUTION TO THINKING CORNER
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  12. How many hamispheres can be obtained from a given sphere?

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  13. Give two real life examples for a frustum of a cone.

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