Wordpandit Question of the day

Question: The population of panthers in a forests decreases by a certain rate (compounded annually). If the current population of panthers is 29160 and the ratio of the decrease in population for the first and second year and second and third year be 10 : 9, what was the population of panthers 3 years ago?

1. 30000
2. 35000
3. 40000
5. 50000

 

Solution posted below. Click on the plus sign to view the solution.

Answer and Explanation

Answer: 3

Solution: The ratio of decrease of population for the first, second and third year is 10:9 and the current population is 29160. So, the population 3 years back = 29160 x (10/9) x (10/9) x (10/9) = 40000