 Questions & Answers    Question Answers

# The population of a town at present is 80,000. If the annual rate of increase is 4%, find the population after 4 years. (Use the formula: $A = p{\left( {1 + \dfrac{r}{{100}}} \right)^n}$, where p is the original population).  Answer Verified
Hint: To find the new population, we are going to use the formula given to us by putting the values in the formula. In this question, p is 80,000, r is 4% and n is 4 years.

Complete step-by-step answer:
The population of the town at present is given to be equal to 80,000.
The rate at which the population increases is given to be 4%.
We are supposed to find the population of the town after 4 years,
We have all the data required to find the new population, let us put the values in the formula,
$A = p{\left( {1 + \dfrac{r}{{100}}} \right)^n}$
$A = 80000{\left( {1 + \dfrac{4}{{100}}} \right)^4}$
$A = 93588.685$
$A = 93589$

Note: Make sure to not mistake the values of old and new population while assigning it to the formula. In the formula, A is the new population, p is the old population, the value of r is 4% and n is 4 years.
Bookmark added to your notes.
View Notes
Population and Sample in Statistics  Population of India  Population Growth Essay  Malthusian Theory of Population  Population Essay  Population Interaction  The Best Christmas Present in the World - Summary  CBSE Class 9 Maths Formulas  Population Explosion Essay  Net Present Value  