- The population of a town was 3600 three years back. It is 4800 right
now. What will be the population three years down the line, if the rate of
growth of population has been constant over the years and has been
compounding annually?
(1) 6000 (2) 6400 (3) 7200 (4) 9600
Solution:
The population grew from 3600 to 4800 in 3 years. That is a growth of 1200 on
3600 during three year span.
Therefore, the rate of growth for three years has been
The rate of growth during the next three years will also be the same.
Therefore, the population will grow from 4800 by 4800 * 1/3= 1600
Hence, the population three years from now will be 4800 + 1600 = 6400.
