In: Economics
If Country A has a GDP of 200 billion and Country B has the same
real GDP per capita. Country A experiences no economic growth,
while Country B grows at a sustained rate of 7 percent. In 60
years, what will be Country B's GDP?
By rule of 70:
GDP doubles =70/growth rate
=70/7=10
The GDP doubles in 10 years for country B.
It doubles 6 times in 60 years
GDP after 60 years =GDP * 2^6=200*2^6=12800 million
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By compound growth fomula
New GDP=old GDP*(1+g)^n
n=60 years
g=7%
old GDP =200 milion
New GDP=200*(1+0.07)^60
=11589.2854
Country B's GDP will be 11589 million