How many years did it take for the population to go from 1 billion to 7 billion?

Name: How many years did it take for the population to go from 1 billion to 7 billion?
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Question

How many years did it take for the population to go from 1 billion to 7 billion? ​

Quizplus · Accepted Answer

The population reached 1 billion in around 1804 and 7 billion in 2011, which is a difference of 7-1=6 billion. It took 207 years for the population to increase by 6 billion, so it took approximately 200 years for the population to go from 1 billion to 7 billion. Therefore, the best choice is B) 200.

How Many Years Did It Take for the Population to Go