One second
1 second
about 1 second
about 1/8 of one second
1 second
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 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.
20 years
27.6 yearst = 0.69 / r where r is the growth rate
Sadly, the way babies are being continually aborted, not going to happen.
a second
It took approximately 123 years for the world's population to double from 3 billion to 6 billion, from 1960 to 1983.
African countries take longer to "double time" meaninh the time it takes for a county's population to double its number