$Q . T h e l e n g t h o f t h e \tan g e n t s f r o m a n y p o i n t o n t h e c i r c l e 15 x^{2} + 15 y^{2} - 48 x + 64 y = 0 t o t h e t w o c i r c l e s 5 x^{2} + 5 y^{2} - 24 x + 32 y + 75 = 0 a n d 5 x^{2} + 5 y^{2} - 48 x + 64 y + 300 = 0 a r e i n t h e r a t i o (1) 1 : 2 (2) 2 : 3 (3) 3 : 4 (4) n o n e o f t h e s e$

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