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The population of a new city is 5 million and is growing at 20% annually. How many years would
it take to double at this growth rate?
  • a)
    3-4 years
  • b)
    4-5 years
  • c)
    5-6 years
  • d)
    6-7 years
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The population of a new city is 5 million and is growing at 20% annual...
Doubling time = 70/r where r is annual growth rate of nation given r = 70/20 '= 3.5 years so ans is 3 - 4 years option : A
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