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A road is banked correctly for a speed o...

A road is banked correctly for a speed of 40 kmph. What is the maximum speed with which a car can negotiate the bend without skidding if the coefficient of friction between road and tyre is 0.3 and radius of the bend is 1 km ?
[Hint : `v_(m)^(2)=v^(2)+mu gr`]

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