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The maximum volume of a cone that can...

The maximum volume of a cone that can be carved out of a solid hemisphere of radius `r` is `3pir^2` (b) `(pir^3)/3` (c) `(pir^2)/3` (d) `3pir^3`

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The correct Answer is:
`(1)/(3) pi r ^(3) cm ^(3)`
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