ECONOMICS (CBSE/UGC NET)

Detailed explanation-1: -To use the Rule of 72 in order to determine the approximate length of time it will take for your money to double, simply divide 72 by the annual interest rate. For example, if the interest rate earned is 6%, it will take 12 years (72 divided by 6) for your money to double.

Detailed explanation-2: -A borrower who pays 12% interest on their credit card (or any other form of loan that is charging compound interest) will double the amount they owe in six years. The rule can also be used to find the amount of time it takes for money’s value to halve due to inflation.

Detailed explanation-3: -A 10% interest rate will double your investment in about 7 years (72 ∕ 10 = 7.2); an amount invested at a 12% interest rate will double in about 6 years (72 ∕ 12 = 6). Using the Rule of 72, you can easily determine how long it will take to double your money.

Detailed explanation-4: -So, if the interest rate is 6%, you would divide 72 by 6 to get 12. This means that the investment will take about 12 years to double with a 6% fixed annual interest rate.

Detailed explanation-5: -The formula is: Time = 72/r, where r is the rate of interest. The rule of 72 says that it will take about 12 years for an investment to double.