AP EAMCET Engineering 2018 Apr 23 Shift 2 Paper

Two solid spheres of radii 2 mm and 4 mm are tied to the two ends of a light string and released in a liquid of specific gravity 1.3 and coefficient of viscosity 1 Pa s. The string is just taut when the two spheres are completely in the liquid. If the density of the materials of the two spheres is 3 2800 kgm ‌–3 , the terminal velocity of the system of the spheres is
(g = 10 ms ‌–2)