The equation of motion of a particle mov...

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

`15m//sec`

`23 m//sec`

`19.5 m//sec`

`25m//sec

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