A velodrome has an aggressively banked curve, where the surface makes an angle of 37.3 degrees with the horizontal. If you are biking around this curve (such that your path traces a horizontal circle with radius 48.3 m as you go around the turn), and the coefficient of static friction of your bike tires with the velodrome surface is 0.644, what is the minimum speed that you can go before starting to slip down the ramp? Give your answer in km/hr