Assume the question is describing a square area with sides [ 1foot 6 inches ] long.
The length of the square's side is 1.5 ft, and its area is (1.5)2 = 2.25 square feet.
The total area required by 6 billion people is (6,000,000,000 x 2.25) = 1.35 x 1010 square ft.
1 mile = 5,280 ft.
1 square mile = (5,280)2 square ft
The area required by the population is (1.35 x 1010 / 5,2802) = 484.25 square miles (rounded).
Corresponding to a square plot of land with sides almost exactly 22 miles long (rounded).
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I must say that a 1'-6" square feels a bit skimpy to me. My shoulders are wider than that,
and I'm not a large guy.
How about a 3' x 3' square for each person.
That makes the required area 1,937 square miles, or a square 44 miles on a side (rounded)
31,622.7766016837933
The square root of 1 billion is: ± 31,622.776602
There are approximately 7.5 trillion square feet in the state of Texas. This means that every person on earth could stand in the state of Texas and still have plenty of room to move around. In fact, every person on earth would only need 62 billion square feet to stand in, which would leave room for the earth's population approximately 120 more times.
>> sqrt(100e9) ans = 316227.766016838
It depends on what you deem to be comfortable. I'd say a person needs about 1 square foot of space at the least, so your answer is 8800 people.
68.1 sq ft.
Texas has an area of approximately 268,820 square miles. Let's ignore the 2.5% that is water. 1 square mile = 5280^2 square feet = 27878400 square feet 268820 mi2 * 27878400 ft2/mi2 = 7494271488000 ft2 7494271488000 ft2 / 6000000000 people ~= 1249.0 ft2/person The same calculation taking out 2.5% for water would result in ~= 1217.8 ft2/person
According to Wikipedia, the total land area of Australia is 2,967,909 square miles. That is 2,967,909 sq miles x 5280 ft/mile x 5280 ft/mile = 82,740,554,265,600 sq ft. Simply divide that by 6 billion and your answer is 13,790 sq ft per person or roughly 1/3 of an acre per person.
31622.7766 is the square root of 1 billion
Square root(7 billion) = 83,666.0027
30 billion square meters = 11,583.0648 square miles.
2.2 billion square feet equates to 78.91 square miles.
1.3 billion people divided by 3,696,100 area per square mile
One billion acres is equal to approximately 1,562,500 square miles.
31,622.7766016837933
China's population density is 378 people per square mile. The estimated population of China as of 2013 is 1.36 billion people.
The largest of the Central Asian Republic is the People's Republic of China. It has 1.351 billion people and is 3.748 million square miles.