Real per capita gdp in south korea in 1957 was about $400, but it doubled to about $800.00 by 1978. a. what was the average annual economic growth rate in south korea over the 21.00 years from 1957 to 1978? (note: round this to two places past the decimal point.

3.33%

Explanation:

Data provided in the question:

Real per capita GDP in South Korea in 1957 = $400

per capita GDP in South Korea in 1978 = $800

Total number of years taken to double the GDP = 21 years

Now,

Using the Rule of 70, which states that

Number of years to double the GDP = 70 ÷ (average annual economic growth rate )

thus,

21 years = 70 ÷ average annual economic growth rate

or

Average annual economic growth rate = 3.33%

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