CBSE Class 11-commerce Answered
The population of a town increases annually by 25%. If the present population is one crore then what is the difference between the population 3 years ago and 2 years ago?
Asked by mk958311 | 19 Sep, 2019, 06:44: AM
Expert Answer
Present population = 1,00,00,000.
Let old population be x.
Population of 1st year ago = x + x of 25% = 1,00,00,000
1.25x = 1,00,00,000
x = 80,00,000
Population of 2nd year ago = x + x of 25% = 80,00,00
1.25x = 80,000
x = 64,00,000
Population of 3rd year ago = x + x of 25% = 64,00,000
1.25x = 64,00,000
x = 51,20,000
Hence,
difference between the population 3 years ago and 2 years ago = 64,00,000 – 51,00,000 = 12,80,000
Answered by Sneha shidid | 19 Sep, 2019, 09:27: AM
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