Hello Friend,

Try the following code:

import java.util.*;
class CalculatePipeArea{
    public static void main(String[] args) 
    {
        double PI=3.14;
        Scanner input=new Scanner(System.in);
        System.out.print("Enter Inner Radius: ");
        double r=input.nextDouble();
        System.out.print("Enter Length: ");
        double h=input.nextDouble();
        System.out.print("Enter thickness: ");
        double d=input.nextDouble();
        double R=d+r;
        double area1=2*PI*r*h;
        double area2=2*PI*R*h;
        double a=Math.pow(R,2)-Math.pow(r,2);
        double area3=2*PI*a;
        double surfaceArea=area1+area2+area3;
        System.out.println(surfaceArea);

    }
}

Thanks