Two tortoises named A and B must run a race. A starts with an average speed of 720 feet per hour. Young B knows she runs faster than A, and furthermore has not finished her cabbage. When she starts, at last, she can see that A has a 70 feet lead but B's speed is 850 feet per hour. How long will it take B to catch A? More generally: given two spe…

TortoiseRacing.groovy

public class Tortoise {
    public static int[] race(int v1, int v2, int g) {
      if (v1 >= v2)
        return null
      def averageTime = (g*3600).intdiv(v2-v1)
      [averageTime.intdiv(3600), averageTime.mod(3600).intdiv(60), averageTime.mod(3600).mod(60)]        
    }
}