Question : The maximum speed with which a car is driven round a curve of radius 18 m without skidding (where, g =10ms −2 and the coefficient of friction between rubber tyres and the roadway is 0.2) is
(A) 36.0kmh^{-1}
(B) 18.0kmh^{-1}
(C) 21.6kmh^{-1}
(D) 14.4kmh^{-1}
Answer : option (C)
Solution :
