The equation of motion of a particle moving on circular path (radius 200 m) is given by = 18 t + 3t2 – 2t3 where is the total distance covered from straight point in metres at the end of t seconds. The maximum speed of the particle will be-
(A) 15 m/sec
(B) 23 m/sec
(C) 19.5 m/sec
(D) 25 m/sec
