This is an interesting question: very simple but incredibly difficult. I have not found a proper answer but have got a partial answer to a related question: given a number of unit squares, what is the smallest circle that they will fit into. The two are linked very simply: if 2 unit squares will fit in a circle of radius 1.118 then a unit circle can hold 2 squares of a maximum side of 1/1.118 units.
The answers given below can be proved only for n = 1 and 2.
1 square : radius = sqrt(2)/2 = 0.707 approx.
2 squares : radius = sqrt(5)/2 = 1.118 approx.
3 squares : radius = 1.288
4 squares : radius = 1.414
5 squares : radius = 1.581
10 squares : radius = 2.121
20 squares : radius = 2.893
30 squares : radius = 3.485.
For all integers up to 35 see www2.stetson.edu/~efriedma/squincir/
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This isn't an exact root. Just calculate the square root on your calculator, and round it to the desired accuracy.This isn't an exact root. Just calculate the square root on your calculator, and round it to the desired accuracy.This isn't an exact root. Just calculate the square root on your calculator, and round it to the desired accuracy.This isn't an exact root. Just calculate the square root on your calculator, and round it to the desired accuracy.
First of all, you need to know the radius of the tank. Second, what does outside square footage mean?
Searching Google with "square root of 396" gave 19.8997487421 (round to 19.9). To discover the method used to calculate the sq root, search Google.
There are infinitely many. Calculate the square root of 250, and round it up. The square of this number will be the first one. The square of any larger integer will also be a perfect square larger than 250.
round to the nearest whole # after estimating the square root