Three circles of raidus 21 cm are placed...

Three circles of raidus 21 cm are placed in such a way that each circle touches the other two. What is the area of the portion enclosed by the three circles ? (In sq. cm)

`441sqrt(3) - 693`

`882sqrt(3) - 693`

`882sqrt(3) - 462`

`441sqrt(3) - 462`

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