A car is moving on a circular level road...

A car is moving on a circular level road of curvature `300m` . If the coefficient of friction is `0.3` and acceleration due to gravity is `10m//s^(2)` , the maximum speed of the car be

`30 "km h" ^(-1)`

`81 "km h"^(-1)`

`108 "km h "^(-1)`

`162 "km h"^(-1)`

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