# What is

What is the annual percentage increase in the city when the population has tripled in 20 years?

Result

p =  5.647 %

#### Solution:

$t=20 \ \\ q=3 \ \\ \ \\ q=(1+p/100)^t \ \\ \ \\ p=100 \cdot \ (q^{ 1/t }-1)=100 \cdot \ (\sqrt[20]{ 3 }-1) \doteq 5.6467 \doteq 5.647 \%$

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