Population of Ranigunj is 8 lakh. If the annual birth rate and death rates of the city are 6.3 % and 1.8 % respectively, then what will be the population of Ranigunj after 2 years ?

873620

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864860

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858640

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886410

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897580

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Solution

The correct option is A 873620
Total Present Popluation (P) = 8 lakh = 800000
Birth rate = 6.3%
Death rate = 1.8%
Effective birth rate (r) = 6.3 - 1.8 = 4.5 %
Time (n) = 2 years
Now,
Population after 2 years,
= P * [1+ (R/100)] ^n
= 800000 * [1 + (4.5/100) ^2
= 873620

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