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rl= 50
r=1/2 l
1/2l * l = 50
1/2 l = 50
r=50 dm
z tw. pitagorasa:
H2= l2 - r2
H2 = 100 do 2 - 50 do 2
H2= 10000-2500
h2= 7500
h = pierwiastek ze 2500 * 3 = 50 pierwiastkow z 3 dm.