Rate of interest becomes one-fourth and time period = 3 as there are 3 quarters in 9 months.

Calculate the simple interest and the compound interest on the principal then calculate the difference.

Use the formula of the compound interest to calculate the interest.

Use the formula of CI to complete the interest.

Find principal from Simple interest formula. Then find CI on that Principal.

Use the formula of compound interest to calculate the compound interest.

Find compound interest for 2 years.

Use the formula of compound interest to calculate the interest

Calculate the CI when compounded annually and when compounded semi-annually, and their difference will be equal to Rs. 482

Calculate the principal by using the formula of simple interest then calculate the compound interest.