Question
The population of a town increased by 10% in the first
year, then again by 15% in the second year, and decreased by 20% in the third year. If the population in 2023 was 29,484, find the population in 2020.Solution
ATQ,
Let the population in 2020 be ‘x’.
ATQ,
x × 1.10 × 1.15 × 0.80 = 29484
Or, x = 29484 × (1/1.10) × (1/1.15) × (1/0.80)
So, x = 30,000
Therefore, the population of the town in 2020 = x = 30,000
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