A square pond has 2 m sides and is 1 ...

A square pond has 2 m sides and is 1 m deep. If it is to be enlarged, the depth remaining the same, into a circular pond with the diagonal of the square as diameter as shown in the figure, then what would be the volume of earth to be removed? `(2pi-2)m^3` (b) `(2pi-4)m^3` (c) `(4pi-2)m^3` (d) `(4pi-4)m^3`

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