Two metal balls of densities d and 3d and radii r_(1) and r_(2) are travelling in the same liquid. The density of the liquid is d//2. The ratio of their terminal velocities is 4:5 respectively. Then the ratio of their radii is

Two metal balls of densities d and 3d and radii r_(1) and r_(2) are tr

1.	Two metal balls of densities d and 3d and radii r_(1) and r_(2) are travelling in the same liquid. The density of the liquid is d//2. The ratio of their terminal velocities is 4:5 respectively. Then the ratio of their radii is
Answer» `3:4` `2:1` `4:5` `5:12` ANSWER :B