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GATE Overflow Test Series | Mock GATE | Test 4 | Question: 10

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The funnel chart given below shows percentage distribution of five different age groups of a
particular city.
 

If the total population increases at rate of $5\%$ per annum and the current total population is $1$ lakh, what will be the population of age group of $5 \leq x < 20$ after $2$ years? [if percentage distribution remains the same]

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Current population of age group between $5$ and $20= (10+16.667)\% \text{ of } 1,00,000 = 26.667 \times 1000 = 26,667 $

Population growth is $5%$ per annum. So, after $2$ years population of the age group will be $26,667 \times (1.05)^2 = 29400$.
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