JAVA oquestion answer (MATH)

1. WAP to find volume, curved surface area and the total surface area of a cylinder.

import java.util.*;

class Area

{

  public static void main()

  {

   Scanner sc=new Scanner(System.in);

 int r,h,v,s,t;

 System.out.println(“Enter radius”);

 r= sc.nextInt( );

 System.out.println(“Enter height”);

 h= sc.nextInt( );

double d=Math.PI;

v=d*r*r*h;

s=2*d*r*h;

t=2*d*r*(h+r);

System.out.println(“Volume of a Cylinder is :”+v);

System.out.println(“Curved Surface area of a cylinder is :”+s);

System.out.println(“Total surface area of a cylinder is :”+t);

  }

}

2.WAP to calculate the area of triangle using Heron’s formula.

area =

where  s = (a+b+c)/2

import java.util.*;

class Area

{

  public static void main()

  {

   Scanner sc=new Scanner(System.in);

 int a,b.c,s,area;

 System.out.println(“Enter first side”);

 a= sc.nextInt( );

 System.out.println(“Enter second side”);

 b= sc.nextInt( );

 System.out.println(“Enter third side”);

 c= sc.nextInt( );

 s=(a+b+c)/2;

 area=Math.sqrt(s*(s-a)*(s-b)*(s-c));

 System.out.println(“Area is”+area);

}

}

3.WAP to find the area of right Triangle where ‘B’ is Base, ‘H’ is Height.(Area=1/2*(B*H))

import java.util.*;

class Area

{

  public static void main()

  {

    Scanner sc=new Scanner(System.in);

 int area,b.h;

 System.out.println(“Enter base”);

 a= sc.nextInt( );

 System.out.println(“Enter height”);

 h= sc.nextInt( );

 area=1/2*(h*b);

System.out.println(“Area is “+area);

}

}

4.WAP to convert inches to feet.

import java.util.*;

class Feet

{

  public static void main()

  {

   Scanner sc=new Scanner(System.in);

 int in,f;

System.out.println(“Enter inch”);

 in= sc.nextInt( );

 f=in/12;

System.out.println(“”Feet”+f);

   }

}

5.    WAP to enter the basic salary of an employee and calculate his total salary on the basis of the following allowances and deductutiln.

DA=25% of basic

HRA=15% of basic

PF=8.33% of basic

Net Pay=basic+DA+HRA

Gross pay=Net Pay-PF

import java.util.*;

class Salary

{

  public static void main( )

  {

   Scanner sc=new Scanner(System.in);

double basic,da,hra,pf,netsal,gross_sal;

System.out.println(“Enter basic salary :”);

sal= Double.parseDouble();

da=(25/100)*basic;

hra=(15/100)*basic;

pf=(8.33/100)*basic;

netsal=basic+da+hra;

gross_sal=netsal-pf;

System.out.println(“Total salary is :”+gross_sal);

  }

}

6.    WAP that output the result of the following evaluatutilns based on the number entered by the user :

a.    natural logarithm of the no.

b.    absolute value of no.

c.    square root of the no.

d.    random no. between 0 &1

import java.util.*;

class Number

{

  public static void main( )

  {

   Scanner sc=new Scanner(System.in);

int n,i;

System.out.println(“Enter the number”);

n=sc.nextInt( );

System.out.println(“Log of a number is”+ Math.log(n));

System.out.println(“Absolute value is “+ Math.abs(n));

System.out.println(“Square root is”+ Math.sqrt(n));

System.out.println(“Random no. are”);

for(i=1;i<=10;i++)

{

  System.out.println(Math.random( ));

}

 }

}

7.    WAP to input a degree of an angle and find its sin value.

import java.util.*;

class SinVal

{

  public static void main( )

  {

   Scanner sc=new Scanner(System.in);

double d,R,S;

System.out.println(“Enter the degree :”);

d=Double.parseDouble();

R=(3.14/180)*d;

S=Math.sin(R);

System.out.println(“Sin value :”+S);

              }}

7.    WAP to input an amount and find how many number of Rupees 1000, 500, 100, 50, 20, 10, 5, 2, 1 notes can be there.

import java.util.*;

class Notes

{

  public static void main( )

  {

   Scanner sc=new Scanner(System.in);

int amt,a;

System.out.println(“Enter the amount”);

amt=sc.nextInt( );

a=amt/1000;

if(a!=0)

System.out.println(“Rs. 1000 * ”+a+” = ”+ (1000*a));

a=0;

amt=amt%1000;

a=amt/500;

if(a!=0)

System.out.println(“Rs. 500 * ”+a+” = ”+ (500*a));

a=0;

amt=amt%500;

a=amt/100;

if(a!=0)

System.out.println(“Rs. 100 * ”+a+” = ”+ (100*a));

a=0;

amt=amt%100;

a=amt/50;

if(a!=0)

System.out.println(“Rs. 50 * ”+a+” = ”+ (50*a));

a=0;

amt=amt%50;

a=amt/20;

if(a!=0)

System.out.println(“Rs. 20 * ”+a+” = ”+ (20*a));

a=0;

amt=amt%20;

a=amt/10;

if(a!=0)

System.out.println(“Rs. 10 * ”+a+” = ”+ (10*a));

a=0;

amt=amt%10;

a=amt/5;

if(a!=0)

System.out.println(“Rs. 5 * ”+a+” = ”+ (5*a));

a=0;

amt=amt%5;

a=amt/2;

if(a!=0)

System.out.println(“Rs. 2 * ”+a+” = ”+ (2*a));

a=0;

amt=amt%2;

a=amt/1;

if(a!=0)

System.out.println(“Re. 1 * ”+a+” = ”+ (1*a));

a=0;

 }

}

8.    WAP to find the angle of a sin value.

import java.util.*;

class SinVal

{

  public static void main( )

  {

   Scanner sc=new Scanner(System.in);

double d,R,S;

System.out.println(“Enter the value in Radian :”);

R=Double.parseDouble(obj.readLine( ));

d=(R*180)/3.14;

S=Math.asin(d);

System.out.println(“Angle value is :”+S);

              }

            }

9.    Present value of an annuity is given by the formula :

            P=A[1-1/(1+i)n/i]

Where, A is the amount deposited, I is rate of interest and n is the number of years of investment. WAP to calculate the present value for 80 depositors, for different perutilds of time at 12% rate of interest. [Year 1997]

import java.util.*;

class Annuity

{

  public static void main()

  {

    Scanner sc=new Scanner(System.in);

    double a,n,b,i;

    for( int x=1;x<=80;x++)

    {

      System.out.println(“Enter the amount :”);

      a=Double.parseDouble();

      System.out.println(“Enter the years :”);

      n=Double.parseDouble(obj.readLine());

             

      i=12.0/100.0;

      b=Math.pow((1+i),n)/I;

                   b=1/b;

      b=1-b;

      b=a*b;

      System.out.println(”Interest is :”+b);

   }

  }