Figure shows $\Delta  ABC$ with $AB = 3, AC = 4$  &  $BC = 5$. Three circles $S_1, S_2$  &  $S_3$ have their centres on $A, B  $ &  $C$ respectively and they externally touches each other. The sum of areas of three circles is

819-334

  • A

    $11\pi$ 

  • B

    $12\pi$ 

  • C

    $13\pi$

  • D

    $14\pi$ 

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