A car is moving on a circular level road of radius of curvature 300 m . If the coefficient of friction is `0.3` and acceleration due to gravity `10 ms^(2)` , the maximum speed the car can have is `(" in kmh"^(-1))`

Options

A. 30
B. 81
C. 108
D. 162

Answer

C

Explanation

`r = 300 m , mu = 0.3 , g = 10 m//s^(2)`
`v_(max)=sqrt(murg)=sqrt(0.3 xx 300 xx 10) =30 m//s = 30 xx 18/5 km//h = 108 km//h`