Physics - Fluid Question with Solution | TestHub

An air bubble of radius 0.1 cm lies at a depth of 20 cm below the free surface of a liquid of density $1000\mathrm{kg}/{\mathrm{m}}^3$. If the pressure inside the bubble is $2100\mathrm{N}/{\mathrm{m}}^2$ greater than the atmospheric pressure, then the surface tension of the liquid in SI unit is (use $\mathrm{g}=10\mathrm{m}/{\mathrm{s}}^2$ )