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r=12m:2=6m
Pb=πrl
l=Pb/(πr)
π≈3,14
l=200/(6*3,14)=10,62 m≈11m
H²=l²-r²
H²=11²-6²=121-36=85
H=√85
H≈9,22m
H≈9m wysokośc