Assume that the drag force on a football depends only on the density of the air, velocity of the ball and the cross-sectional area of the ball. of different sizes but the same density are dropped in an air column. The terminal velocity reached by of masses 250 g and 125 g are in the ratio :
(A) 21/6
(B) 21/3
(C) 21/2
(D) 22/3
