Question : The population of a town is 1,25,000. If the annual birth rate is 12.7% and the annual death rate is 2.7%, how much will the population increase after 3 years?
Option 1: 43,285
Option 2: 41,375
Option 3: 42,565
Option 4: 40,275
Correct Answer: 41,375
Solution : The present population, $P$ = 1,25,000 Increase rate, $r$ = 12.7% – 2.7% = 10% Time, $n$ = 3 years Total population = $P(1+\frac{r}{100})^{n}$ = $125000(1+\frac{10}{100})^3$ = $125000(\frac{11}{10})^3$ = $125000×\frac{11}{10}×\frac{11}{10}×\frac{11}{10}$ = $166375$ $\therefore$ Population increase = 166375 – 125000 = 41,375 Hence, the correct answer is 41,375.
Result | Eligibility | Application | Selection Process | Cutoff | Admit Card | Preparation Tips
Question : The population of town B is 300% more than that of town A. For the next two years, the population of A increases by $x$% per year, and that of B decreases by the same percentage per year. After 2 years, if the population of A and B become equal, then the value of $x$ is
Question : Due to a pandemic, the population of a city reduces at the rate of 2% per annum. What will be its total population after 2 years if the present population of the city is 45,000?
Question : The population of A town is 9000. If the number of females increases by 5% and the number of males by 7.5%, what will be the total population after the increase when the number of females is currently 3000?
Question : The population of a city is 3,52,314. It increases annually at the rate of 15% per annum. What was its population 2 years ago?
Question : If the average cost falls, the marginal cost
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile