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31.689 years.
If you counted 1 number per second, it would take 220 years to count to 7 billion.
If you counted 1 number per second, it would take at least 220 years to count to 6.9 billion.
Probably 6
Assuming it takes about 1 second to count each dollar, it would take one billion seconds, or about 31 years and 8 months.
100 years
The worlds population was 3.3 billion in 1965, it is now 6.7 billion so it that instance of doubling took 34 years .
The world population reached one billion in 1804 and seven billion in 2012. That's a difference of 208 years.
31.688 years.
31.689 years.
One Billion!
If you counted 1 number per second, it would take 63 years to count to 2 billion.
If you counted 1 number per second, it would take 3200 years to count to 100 billion.
If you counted 1 number per second, it would take 220 years to count to 7 billion.
If you counted 1 number per second, it would take at least 220 years to count to 6.9 billion.
Probably 6
By 2050 we should reach around 9.1 billion people.