Question

WAP to calculate the area of triangle and volume of cylinder in java by public static void main

Answer 1

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1) Area of a triangle.

import java.util.*;

public class TriangleArea{

   public static void main(String s[]){

       Scanner sc=new Scanner(System‎.‎in);

       float height,base,area;

       System.out.print("Enter height of the triangle: ");

       height=sc.nextFloat();

       System.out.print("Enter the base of the triangle: ");

       base=sc.nextFloat();

       sc.close();

       area=base * height * 1/2.0f;

       System.out.println("The area of the triangle is: "+area+" sq units.");

   }

}

$\rule{300}{2}$

2. Volume of a cylinder.

import java.util.*;

public class CylinderVolume{

   public static void main(String s[]){

       Scanner sc=new Scanner(System‎.‎‎‎‎in);

       double r,h,v;

       System.out.print("Enter radius: ");

       r=sc.nextDouble();

       System.out.print("Enter height: ");

       h=sc.nextDouble();

       v=Math.PI * r * r * h;

       System.out.println("Volume: "+Math.round(v*100)/100.0);

       sc.close();

   }

}

See attachments for output.