The lateral surface area of a cone is changing at the rate of 6 cm2/sec, where S = atr Vr2 + h . Leth = 2r. What is the change in the radius when r = 2? O dr 3 cm/s dt 4 n O dr = 3 dt 8 1 cm/s O dr dt 27 cm/s O dr 3 dt 215 m cm/s 1 2 3 4 5 6 7 8 9 1