1. The problem statement, all variables and given/known data a turn of radius 20m is banked for vehicles going at a speed of 10 m/s ( considering no friction). If the friction co-efficient between road and tyre is 0.3, then the minimum speed of the vehicle is 5x/(11.5)^1/2. 2. Relevant equations in case of banking and no friction tan A= v^2/rg in case of banking and friction both, v=[rg(u + tan A)/(1 - u tanA)]^1/2 3. The attempt at a solution well, i did not actually understand what the first statement means because if there is friction, then how can one avoid it?