Water rises to a height of 10cm in a capillary tube and mercury falls to a depth of 3.42 cm in the same capillary tube . If the density of mercury is 13.6 g/cc and the angle of contact of mercury and water are 135° and 0° respectively , the ratio of surface tension of water to mercury is : A) 1: 0.15 B) 1:3 C) 1: 6.5 D) 1.5: 1

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