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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)

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