12. Write a program in Java to implement multilevel inheritance. Facts about Multilevel Inheritance in Java: 1. Multilevel inheritance occurs when a class is derived from another class, which is also ...

1. A plastic manufacturer sells plastic in different shapes like 2D sheet and 3D box. The cost of sheet is Rs 40/ per square ft. and the cost of box is Rs 60/ per cubic ft. Implement it in Java to ...