Question
The ratio of the compound
interest earned on an amount of Rs. 'p' at an interest rate of 15% per annum for 2 years to the simple interest earned on Rs. (p - 3000) at an interest rate of 12% per annum for 3 years is given as 129:90. Calculate the total interest obtained from both the compound interest and simple interest combined.Solution
ATQ, From the question: [p × (1 + 15/100) 2 – p]/[{(p – 3000) × 12 × 3}/100] = 129/90 [129p/400]/[{(p – 3000) × 36}/100] = 129/90 p/[4 × (p – 3000) × 2] = 1/5 5p = 8p – 24000 p = 8000 Now, CI received on Rs.8000 at a 15% rate after 2 years: 8000 × (1 + 15/100) 2 – 8000 = Rs.2580 And, SI received on Rs.5000 at a 12% rate after 3 years: (5000 × 12 × 3)/100 = Rs.1800 Required sum = 2580 + 1800 = Rs.4380
The ability of an object to take on many forms is known as:
An abstract class:
What is an interface in OOP (e.g., Java, C#)?
What are "getter" and "setter" methods primarily used for in the context of encapsulation?
Which of the following is a common mechanism to achieve abstraction in OOP?
Which of the following best represents a real-world example of abstraction?
Which of the following is a common way to achieve abstraction in OOP?
Which access modifier is most commonly used to achieve data hiding in encapsulation?
Which type of polymorphism is achieved through method overloading (where multiple methods have the same name but different parameters)?
If a class contains an abstract method, what must be true about the class itself?
