Properties of Matter Part 2

The velocity of a small ball of mass 0.3g and density 8g∕cc when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is 1.3g∕cc, then the value of viscous force acting on the ball will be x×10−4N, The value of x is _______. [use g=10m∕s2 ]