ECONOMICS (CBSE/UGC NET)

Detailed explanation-1: -If you want to double your money in three years, your investments should earn between 21% to 24% (72/3 years) every year. Similarly, if you want to double your money in five years, your investments will need to grow at around 14.4% per year (72/5).

Detailed explanation-2: -If your money is in a savings account earning 3% a year, it will take 24 years to double your money (72 / 3 = 24).

Detailed explanation-3: -The Rule of 72 is a calculation that estimates the number of years it takes to double your money at a specified rate of return. If, for example, your account earns 4 percent, divide 72 by 4 to get the number of years it will take for your money to double. In this case, 18 years.

Detailed explanation-4: -Applying the rule of 72, the number of years to double your money is 72 divided by the annual interest rate in percentage. In this question, the annual percentage rate is 5%, thus the number of years to double your money is: 72 / 5 = 14.4.

Detailed explanation-5: -Roughly translated: In wanting to know of any capital, at a given yearly percentage, in how many years it will double adding the interest to the capital, keep as a rule [the number] 72 in mind, which you will always divide by the interest, and what results, in that many years it will be doubled.