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Pp = pi*r(do kwadratu)
Pb / 5 = 2Pp /*5
Pb = 5*2Pp
Pb = 10Pp
2*pi*r*h = 10*pi*r(do kwadratu) /:2
pi*r*h = 5*pi*r(do kwadratu) /:pi
r*h = 5*r(do kwadratu) /:r
h = 5*r(do kwadratu)/r
h = 5r
h do r = 5r do r = 5 do 1 = 5:1
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