CODE:
class Roomarea
{
protected double l, b;
Roomarea(double len, double br)
{
l=len;
b=br;
}
void putdata()
{
System.out.println("Area of Room:
"+(l*b));
}
}
class Roomvol extends Roomarea
{
double h;
Roomvol(double len, double br, double he)
{
super(len, br);
h=he;
}
void putdata()
{
super.putdata();
System.out.println("Volume of Room:
"+(l*b*h));
}
}
public class EXP18Q4
{
public static void main(String[] args)
{
Roomvol r1 = new Roomvol(10, 20, 10);
r1.putdata();
} }
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