# Rule of 72

The "rule of 72" states that the number of periods "n" that it will take to double an investment whose rate of return is "r" percent is approximately 72/r. That is, nr is approximately equal to 72. Verify this approximation for r = 4,6,8 and 10.

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In order to answer this question, we need to calculate the time period (since we ...

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The solution explains the calculations using rule of 72.

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