Banked Frictionless Curve And Flat Curve With Friction

A car of mass m = 1200 kg traveling at 40. 0 km/hour enters a banked turn covered with ice. The road is banked at an angle theta, and there is no friction between the road and the car's tires. What is the radius r of the turn if [tex]\theta[/tex] = 20. 0 degrees (assuming the car continues in uniform circular motion around the turn)? Banked frictionless curve and flat curve with friction a car of mass 1500.