8. Two capillaries made of same material but of different radii are dipped in a liquid. The rise of liquid in one capillary is 2.2 cm and that in the other is 6.6 cm. The ratio of their radii is

(a)  9 : 1 (b)  1 : 9 (c)   3 : 1 (d)  1 : 3 Ans. c (11)