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ICSE Class 10 Computer Applications Question 41 of 43

User-Defined Methods — Question 41

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Question

Question 39

Design a class to overload a function area( ) as follows :

(i) double area(double a, double b, double c) with three double arguments, returns the area of a scalene triangle using the formula :

area=s(s−a)(s−b)(s−c)\text{area} = \sqrt{s(s-a)(s-b)(s-c)}

where s=a+b+c2s = \dfrac{a +b + c}{2}

(ii) double area(int a, int b, int height) with three integer arguments, returns the area of a trapezium using the formula :

area = 12\dfrac{1}{2} height(a + b)

(iii) double area(double diagonal1, double diagonal2) with two double arguments, returns the area of a rhombus using the formula :

area = 12\dfrac{1}{2} (diagonal1 x diagonal2)

import java.util.Scanner;

public class KboatOverload
{
    double area(double a, double b, double c) {
        double s = (a + b + c) / 2;
        double x = s * (s-a) * (s-b) * (s-c);
        double result = Math.sqrt(x);
        return result;
    }
    
    double area (int a, int b, int height) {
        double result = (1.0 / 2.0) * height * (a + b);
        return result;
    }
    
    double area (double diagonal1, double diagonal2) {
        double result = 1.0 / 2.0 * diagonal1 * diagonal2;
        return result;
    }
}
Output
BlueJ output of KboatOverload.java
BlueJ output of KboatOverload.java
Answer

Source: This question is from User-Defined Methods, Computer Applications — Class 10, ICSE Board.

Key Concepts Covered

This question tests your understanding of the following concepts from the chapter User-Defined Methods: Question, Design, Class, Overload, Area, Follows. These are fundamental topics in Computer Applications that students are expected to master as part of the ICSE Class 10 curriculum.

A thorough understanding of these concepts will help you answer similar questions confidently in your ICSE examinations. These topics are frequently tested in both objective and subjective sections of Computer Applications papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.

How to Approach This Question

Read the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.

Key Points to Remember

  • Write programs with proper indentation and comments.
  • Trace through your code with sample inputs to verify correctness.
  • Explain the logic behind each step of your solution.
  • Familiarise yourself with common library functions and methods.

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