Question

The population growth for Norway is:

1 birth every 1 minutes and 40 seconds

1 death every 3 minutes and 16 seconds

1 arrival every 57 seconds

1 departure every 1 minute and 49 seconds

Assume the current population is 35,201,142. Write a program that calculates the population n minutes from now. Declare a final integer called minutesElapsed and perform your calculations based on that

Answer 1

/*******************************CurrentPopulation.java*****************************/

public class CurrentPopulation {

   public static void main(String[] args) {

       final int minutesElapsed = 140;
       final int BIRTH_TIME = 100; // birth in second
       final int DEATH_TIME = 196; // death in second
       final int ARRIVAL_TIME = 57; // Arrival in second
       final int DEPARTURE_TIME = 109; // departure in second
       int currentPopulation = 35201142; // current population

       int secondElapsed = minutesElapsed * 60; // elapsed time in second

       int birth = secondElapsed / BIRTH_TIME;// calculate births
       int death = secondElapsed / DEATH_TIME; // calculate deaths
       int arrival = secondElapsed / ARRIVAL_TIME; // calculate arrivals
       int departure = secondElapsed / DEPARTURE_TIME; // calculate departures

       currentPopulation = currentPopulation + birth - death + arrival - departure;

       System.out
               .println("Current Population of Norway after " + minutesElapsed + " Minutes is: " + currentPopulation);
   }
}
/***************************************output************************************/

Current Population of Norway after 140 Minutes is: 35201254

Please let me know if you have any doubt or modify the answer, Thanks :)