Q.11. Two capillaries of same length and radii in the ratio 1 : 2 are connected in series. A liquid flows through them in streamlined condition. If the pressure across the two extreme ends of the combination is 1 m of water. the pressure difference across first capillary is
(a) 9.4 m
(b) 4.9 m
(c) 0.49 m
(d) 0.94 m