v=sqrt(2*981*(400-h)*1/1/100) r=v*3*1/(10^(-6)) h=(f*200000*1/3+27/25)*v^2*1/(2*981/100) 10^(1/(sqrt(f)))=(10^(-3)*1/(37*3/10)+251*1/(r*sqrt(f))/100)^(-2)

$$v = sqrt{frac{1962}{100} left(- h + 400right)}$$

v*3
r = ——
1.0e-6

$$r = frac{3 v}{1.0 cdot 10^{-6}}$$

/f*200000 27 2
|——– + –|*v
3 25/
h = ——————
/2*981
|—–|
100 /

$$h = frac{v^{2}}{2 frac{981}{100}} left(frac{200000 f}{3} + frac{27}{25}right)$$

1
—–
___
/ f 1
10 = ———————
2
/ / 251
| |——-||
| | ___||
|0.001 r*/ f /|
|—— + ———|
|/37*3 100 |
||—-| |
10 / /

$$10^{frac{1}{sqrt{f}}} = frac{1}{left(frac{251}{100} frac{1}{sqrt{f} r} + frac{0.001}{frac{3}{10} cdot 37}right)^{2}}$$