An air bubble of diameter 6 mm rises steadily through a solution of density 1750 kg / m^3 at the rate of 0.35 cm / s. The co-efficient of viscosity…

An air bubble of diameter $\displaystyle 6$ mm rises steadily through a solution of density $\displaystyle 1750 \mathrm{~kg} / \mathrm{m}^3$ at the rate of $\displaystyle 0.35 \mathrm{~cm} / \mathrm{s}$. The co-efficient of viscosity of the solution (neglect density of air) is $\displaystyle \_\_\_\_$ Pas (given, $\displaystyle \mathrm{g}=10 \mathrm{~ms}^{-2}$ ).