1.

Two circle S_1=0,S_2=0 of equal radius 'r' intersect such that one circle passes through the centre of the other circle.Another circle (S=0) touches S_1=0 internally and S_2=0 externallyand also touches the line joining the centres of the two circles S_1=0 and S_2=0 .Then radius of S=0 is

Answer»

`(sqrt3r)/2`
`(sqrt3r)/4`
`(sqrt3r)/8`
none of these

Answer :B


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