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, \[X=\pi P{{R}^{4}}/8\eta L)\] [DCE 2005]

• A.            \[\frac{8}{9}X\]                   
• B.            \[\frac{9}{8}X\]
• C.            \[\frac{5}{7}X\]                   
• D.            \[\frac{7}{5}X\]