What will be difference in population 3 years ago and 2 years ago of Devon village, whose current population is 100000 and which is increasing at a rate of 25% every year?
Answers
Step-by-step explanation:
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Given : current population is 100000
increasing at a rate of 25% every year
To Find : difference in population 3 years ago and 2 years ago
Solution:
Let say Population 3 years ago = P
Rate of increase = 25 %
n = 3
Current = 100000
100000 = P (1 + 25/100)³
=> 100000 = P (5/4)³
=> 100000 = 125P/64
=> P = 51,200
Population 2 years ago or 1 year after 3 years ago
= 51200 ( 1 + 25/100)
= 51200 ( 1 + 1/4)
Difference = 51200 ( 1 + 1/4) - 51200
= 51200 (1/4)
= 12800
difference in population 3 years ago and 2 years ago = 12800
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