Topic Details (Notes format)

How to Calculate Simple Interest

Subject: Mathematics

Book: Maths Mastery

Simple interest is used when interest is earned only on the original principal each period, making it less aggressive than compound interest. The formula is I = P × r × t, where P is the principal (initial amount), r is the annual interest rate (as a decimal), and t is the time in years. If you deposit ₹5,000 at 10% annual simple interest for 3 years, the interest I = 5,000 × 0.10 × 3 = ₹1,500. The amount after 3 years becomes ₹6,500. Simple interest frequently applies to short-term loans or straightforward lending agreements. Learning to compute it helps you compare financial products, negotiate loan terms, and develop a clearer view of short-term interest scenarios in everyday life.

Practice Questions

If the cost price of an item is Rs. 400 and the selling price is Rs. 500, what is the profit percentage?

View Question

If a:b = 2:3 and b:c = 4:5, what is a:c?

View Question

If a rectangle has a length of 10 cm and a width of 6 cm, what is its perimeter?

View Question

If sin(θ) = 0.6 and θ is acute, what is cos(θ)?

View Question

If log(100) = 2 and log(10) = 1, what is log(1000)?

View Question

If a:b = 3:4 and b:c = 5:6, what is a:c?

View Question

If a square has a perimeter of 64 cm, what is its area?

View Question

If x:y = 4:5 and y:z = 2:3, what is x:z?

View Question

If a+b = 10 and ab = 21, what is the value of a^3 + b^3?

View Question

The base of a triangle is 10 cm and its height is 6 cm. What is its area?

View Question