We all talk about population explosion. But wait a second. Do we have any idea on how much people are there in the world if we put them all together. Here is a quick back of the envelope calculation:
A fair packing can be 3 people / 1 meter
i.e., 9 people / 1 sq meter
= 10 people / 1 sq meter
= 10 people / (10^-3 x 10^-3) sq km
= 10 people / 10^-6 sq km
= 1 people / 10^-7 sq km
Total population of world
= 7 billion people
= 7 x 10^9 people
= 7 x 10^9 people * 10^-7 sq km / 1 people
= 700 sq km
= (27 km) square
= Size of city of Mumbai !!
A fair packing can be 3 people / 1 meter
i.e., 9 people / 1 sq meter
= 10 people / 1 sq meter
= 10 people / (10^-3 x 10^-3) sq km
= 10 people / 10^-6 sq km
= 1 people / 10^-7 sq km
Total population of world
= 7 billion people
= 7 x 10^9 people
= 7 x 10^9 people * 10^-7 sq km / 1 people
= 700 sq km
= (27 km) square
= Size of city of Mumbai !!
1 comment:
First, I don't think I want to stand in the same square meter as 9 other people. Second,you can get a lot more space by using the vertical dimension. Third, and most importantly, keep on blogging!
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