GATE 2024 Mining Engineering: Calculate Settling Chamber Length for Particulate Matter (Stoke's Law)

Polluted air with particulate matters of diameter 50 μ m enter with a horizontal velocity of 1.0 m/s at a height of 0.5 m from the bottom of a dry settling chamber. The density of the particle is 2000 kg/m³ and dynamic viscosity of the air is 1.8×10^-5kg/m-s.
Assume streamline flow and the density of air is negligible as compared to particles and uniform horizontal velocity of 1.0 m/s of gas and particles within the chamber.
Considering particle settling follows Stoke's law, the minimum length in m, of the chamber required for settling of the particle at its bottom, is (round off up to 2 decimals)