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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