Hi Friend,

Try the following code:

import java.util.*;

public class RaceCar{
double hw;
double weight;
double milesPerGal;
double zeroTo60;
public RaceCar(double hw,double weight,double milesPerGal,double zeroTo60){
this.hw=hw;
this.weight=weight;
this.milesPerGal=milesPerGal;
this.zeroTo60=zeroTo60;
}
public void setHw(double hw){
this.hw=hw;
}
public double getHw(){
return hw;
}
public void setWeight(double weight){
this.weight=weight;
}
public double getWeight(){
return weight;
}
public void setMilesPerGal(double milesPerGal){
this.milesPerGal=milesPerGal;
}
public double getMilesPerGal(){
return milesPerGal;
}
public void setZeroTo60(double zeroTo60){
this.zeroTo60=zeroTo60;
}
public double getZeroTo60(){
return zeroTo60;
}
public double calculateTime(){
double acceleration=0.167/zeroTo60;

return Math.sqrt(2 * 0.25 / acceleration);

}

public static void main(String[]args){
Scanner input=new Scanner(System.in);
System.out.println("Enter horse power for car 1 between the range 200 to 700 hp");
double hw1=input.nextDouble();
System.out.println("Enter weight for car 1 between the range 1000 to 3000 pounds.");
double w1=input.nextDouble();
System.out.println("Enter horse power for car 2 between the range 200 to 700 hp");
double hw2=input.nextDouble();
System.out.println("Enter weight for car 2 between the range 1000 to 3000 pounds.");
double w2=input.nextDouble();

double zeroTo60CarA=w1/hw1/0.7;
double zeroTo60CarB=w2/hw2/0.7;

RaceCar car1=new RaceCar(hw1,w1,0.25,zeroTo60CarA);
double time1=car1.calculateTime();
System.out.println("Time taken by car 1= "+time1);
RaceCar car2=new RaceCar(hw2,w2,0.25,zeroTo60CarB);
double time2=car2.calculateTime();
System.out.println("Time taken by car 2= "+time2);
}
}

Thanks