1) write a program to find the ,difference and prduct of two numbers

// to find the sum,difference and product of two numbers

public class simplification

{

public static void main (String args[])

{

int a,b,c,d,e;

a= 45;b=20;

c=a+b;

d=a-b;

e=a*b;

Sysem.out.println("the sum of two numbers ="+c);

Sysem.out.println("the difference of two numbers ="+d);

Sysem.out.println("the product of two numbers ="+e);

}

}

2) write a program to find area of circumfrence of circular ring,whose outer and innerradii are 21cm and 14cm

public class circle

{

public static void main (string args[])

{

int r1,r2;

double ar,ar1,ar2,c1,c2;

r1=14;r2=21;

ar1=22/7*r1*r2;

ar2=22/7*r2*r2;

c2=2*22/7*r1;

c2=2*22/7*r2;

Sysem.out.println("the inner area ="+ar1);

Sysem.out.println("the outer area ="+ar2);

Sysem.out.println("the area of ring ="+ar);

Sysem.out.println("the inner circumfrence ="+c1);

Sysem.out.println("the outer area ="+c2);

}

}