$($c$)$ A $1\mathrm{.}2$ mm diameter tube is inserted into water whose density $45960k\frac{g}{m^3},$ and it is observed that water rises $5$ mm in the tube, making an angle as shown in Fig. Q$1($c$).$ Determine the surface tension of the liquid.

Hint: Using common notations ${}_s=\frac{gRh}{2cos},g=9\mathrm{.}81\frac{m}{s^2}$

$(5$ marks$)$