The worlds population was 3.3 billion in 1965, it is now 6.7 billion so it that instance of doubling took 34 years .
The time it will take for a population to double is based on numerous factors, not solely time. The fertility rate, food production rate, security (from foreign invasions and domestic violence or revolt), mortality rate, and numerous other elements are requisite to determine how long it will take a population to double in size. In many cases, the combination of these factors will not lead to any growth at all (such as in a war-torn country with massive human flight or a stable country where the fertility rate is less than 2.0 and there is no immigration).
It will take 19 years to double the initial population. 2=1(1.20)^t/5 t/5=log2/log1.2 t/5=3.802 t=19.01 years
It took until the early 19th century for the global population to reach one billion. This milestone was reached around the year 1804.
52 years 1915 - U.S. population passed 100,000,000. 1967 - U.S. population passed 200,000,000. 2006 - U.S. population passed 300,000,000. 2043 - U.S. population is expected to pass 400,000,000.
The world population in 1950 was estimated to be around 2.5 billion people. This marked a significant increase from earlier centuries due to advancements in healthcare and food production. The population growth continued to accelerate in the following decades.
Sadly, the way babies are being continually aborted, not going to happen.
how long did it take to double from 3 billion to 6 billion
With a 2009 rate of natural increase in Mexico of 1.13%, its population would be expected to double in ~61 years.
Depends on how much power thirst you drink.
100 years
mankind's don't need time to double the size. becauze they are very fast in doubling the population.
Since the population doubled for the first time, it would take the same amount of time to double a second time if the rate of growth remains constant. This is known as the doubling time and it depends on the population growth rate.
The Rule of 70 is a quick way to estimate how long it takes for a population to double in size based on its growth rate. To use the Rule of 70, divide 70 by the annual growth rate of the population. The result will give you approximately the number of years it takes for the population to double.
African countries take longer to "double time" meaninh the time it takes for a county's population to double its number
The time it will take for a population to double is based on numerous factors, not solely time. The fertility rate, food production rate, security (from foreign invasions and domestic violence or revolt), mortality rate, and numerous other elements are requisite to determine how long it will take a population to double in size. In many cases, the combination of these factors will not lead to any growth at all (such as in a war-torn country with massive human flight or a stable country where the fertility rate is less than 2.0 and there is no immigration).
The world population reached one billion in 1804 and seven billion in 2012. That's a difference of 208 years.
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