I read this odd spot* some time ago: If the population of China was to walk by you in single file, the line would never end due to the rate of population growth.
I thought, “No. Really? Really?” I’ve looked up China’s birth rate in Wikipedia and with a population of 1,298,847,624 people and a growth rate of 0.57%, and assuming that growth is mainly due to births, then there are 14 new Chinese babies every minute, or one birth every 4.3 seconds.
Now, I reckon that in 4.3 seconds, about three people could walk pass me in single file. That means that if I wait long enough, then I will eventually get to the end of the line.
It would take a while and I suppose I can work out how exactly how long. Bother. It’s late but now I have to do it. Hey, this would make a good short answer problem in Unit 3 of Maths Methods.
Okay, it’ll take 58 years based on the assumptions above (and 365.24 days a year). If someone wants to check this, I’d appreciate it.
Of course, the growth rate 0.57% won’t be constant. China’s population profile is onion-shaped. I’m not sure what that means in terms of rate of population growth. The profile is probably dependent on the Government’s population policy too. Perhaps the current state of affairs isn’t all that significant in the grand scheme of the 58.4 years that I’m sitting there watching them all walk by.
*Girls will probably know this trivia already and also the ones that go ‘Until 1990, sausages were still legal tender in East Germany’ and ‘No piece of paper can be folded more than 7 times’.
China’s population onion (Source: NationMaster.com)