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A steel ball of radius 1 mm is falling v...

A steel ball of radius 1 mm is falling vertically through a tank of oil at `30°C`. If the density of oil is `2×10^2kg/m^3`, density of steel is `8×10^2 Kg/m^3` and `eta` of oil `2NS/m^2`, what will be the constant velocity attained by the ball?

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