Question
The population of a city grows by 12% annually. If the
population after 2 years will be 31,360, what is the present population?Solution
ATQ,
Let, the present population be ‘x’.
ATQ,
Population after 2 years = 1.12 × 1.12 × x = 31360
Or, x = 31360 × (1/1.12) × (1/1.12)
So, x = 25,000
Therefore, present population = x = 25,000
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