Doubling Time Of Population

Why is there great variation among various regions in doubling their population?

What is population doubling time? Explain the characteristics of the growth of population in India in Phase I and II.

The population of a village increases continuously at the rate proportional to the number of its inhabitants present at any time. If the population of the village was 20,000 in 1999 and 25000 in the village was 20,000 in the population of the village in 2009?

The population of a village increases continuously at the rate proportional to the number of its inhabitants present at any time. If the population of the village was 20,000 in 1999 and 25000 in the village was 20,000 in the population of the village in 2009?

The polulation of a city increases at a rate propotional to the population at that time. If the population of the city is doubled in 60 years, then population will be triplet in (log2=0.6912,log 3=1.0986)

In 1982, population of world was 450 crores. If the rate of increase of population is constant (uniform) and it is doubled in 38 years,then what will be the population of world in 2020AD?

The population of a city ijncreases by 20% at the end of every year. During which of the following years , the population would be doubled ?