0,2831=0,29
4,0376=4,04
19,6201=19,61
3,4057=3,41
6,4817=6,48
1/Vх = 2/5
2Vх = 5
Vх = 5:2
Vх = 2,5
Х = 2,5^2
Х = 6,25