[UPSC CSE 1987] Mechanics of Continuous media (Q309, 20M)

A steel ball $1.00\text{ mm}$ in diameter falls at a constant speed of $0.176\text{ cm s}^{-1}$ in a large vessel filled with oil. Calculate the dynamic viscosity of the oil (Density of steel $= 7,700\text{ kg/m}^3$ density of oil $= 900\text{ kg/m}^3$ ).