The worlds population was 3.3 billion in 1965, it is now 6.7 billion so it that instance of doubling took 34 years .
34 years
75 years
which of the following did not take place during the 1950?
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
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.
You take the total population of the world and deduct how many of them are on the surface of the earth at any given time.
Sadly, the way babies are being continually aborted, not going to happen.
33.4 years for south Africa to double
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.
100 years
Depends on how much power thirst you drink.
mankind's don't need time to double the size. becauze they are very fast in doubling the population.
The rule of 70, for Population growth, is the process whereby you divide 70 by the population growth rate to have an estimate of how long it will take, in years, for the Country's population to double.
20 years
27.6 yearst = 0.69 / r where r is the growth rate
African countries take longer to "double time" meaninh the time it takes for a county's population to double its number
The world population reached one billion in 1804 and seven billion in 2012. That's a difference of 208 years.