Calculate the rate of interest if the period of doubling of an investment is 8 years.
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Explanation:
The Rule of 72 is a quick, useful formula that is popularly used to estimate the number of years required to double the invested money at a given annual rate of return.
While calculators and spreadsheet programs like excel sheets have inbuilt functions to accurately calculate the precise time required to double the invested money, the Rule of 72
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