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1. The world population growth rate at a certain reference year was 3.5%. Assuming exponential growth (घातांकी बढ़त, तेजी से विकास होने)of population, after how many years, the population of the world would have increased by a factor 16 ?

(A) ~ 80 years

(B) ~ 40 years

(C) ~ 160 years

(D) ~ 320 years

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by drvishwa

please tell me answer of this question in details way

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