How long will it take for the entire population of China to walk past you in a single file line?

I was told that it would never end at the rate of the population growth, and with the number of people there.

Answer

Well, one person will pass you every 1.5 seconds. There are 1.3 billion people on china. 1.3 billion times 1.5= 1,950,000,000 seconds divided by 60= 32.5 million minutes divided by 60= 540,000 hours which is about 61 years! It will take the entire population of China about 61 years to pass you!!!

But,

Then all the people who were born during that 61 years have to pass.

So,

Given：

China's Total Population (2007) ＝1.32129 billion (official number),

China's Population Growth (2007) ＝6.81 million (to make it simple, we suppose this number doesn't change over years), and

Time Needed by Each Person to Pass You ＝1.5 seconds (taken from the text above).

Now we can calculate as follows:

People Past You Each Year ＝365×24×60×60÷1.5 ＝21024000

"Net" People Past You Each Year (deduct the annual growth) ＝21024000－6810000 ＝14214000

Total Years Needed ＝1321290000÷14214000 ≈ 93 Years

Hence,

I wish you a long life! :-)

First answer by FLINTSTONE. Last edit by Brave Fencer. Contributor trust: 25 [recommend contributor]. Question popularity: 20 [recommend question]