Let a liquid of density ρ rise a height h in a capillary of raduis r, then we can write
hrρg = 2Tcosθ
where T is surface tension of that liquid and θ is angle of contact.
Let Tm and Tw be the surface tension of water and mercury.
Tm/Tw = [(3.112 * 13.6)/(10 * 1)] * [cos0 / cos(135)]
θw is the angle of contact of water 0 degrees
= 5.98