As shown in figure, wheel A of radius rA = 10 cm is coupled by belt B to wheel C of radius rC = 25 cm. The angular speed of wheel A is increased from rest at a constant rate of 1.6 rad/s2 . Time after which wheel C reaches a rotational speed of 100 rpm, assuming the belt does not slip, is nearly
(A) 4 sec
(B) 8 sec
(C) 12 sec
(D) 16 sec
