\(\frac{ h _1}{ h _2}=\frac{ S _1}{ S _2} \frac{\rho_2}{\rho_1}\)
\(\frac{5}{ h _2}=\left[\frac{1}{2}\right]\left[\frac{2}{1}\right] \Rightarrow h _2=5\,cm =0.05\,m\)
Info about angle of contact not there so most appropriate is \(3\)
(જો $\mathrm{g}=10 \mathrm{~ms}^{-2}$ હોય).