A circular hole of 4 mm in diameter and ...

A circular hole of 4 mm in diameter and 12 mm deep in a metal block is rebored to increase the diameter to 4.12 mm, then the amount of metal removed is approximately

`2.88pi mm^(3)`

`3.99 pi mm^(3)`

`3.79 pi mm^(3)`

`3.725 pi mm^(3)`

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