Q 1710401310.     Four equal discs are placed such that each one
touches two others. If the area of empty space
enclosed by them is `150/847` sq cm, then the
radius of each disc is equal to

CDS 2016
A

`7/6 cm`

B

`5/6 cm`

C

`1/2 cm`

D

`5/11 cm`

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