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60. Two capillary of length L and 2L and of radius R and 2R are connected in series. The net rate of flow of fluid through them will be

(given rate of the flow through single capillary, X=(Π PR4)/ηL

(a) (8/9)X                                    (b) (9/8)X

(c)  (5/7)X                                    (d) (7/5)X

Answer-a

(12)

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